/* ============================================================
   AIGC.GURU - Complete Responsive CSS Framework
   ============================================================ */

/* --- Custom Properties / Theming --- */
:root {
  /* Brand Colors */
  --color-primary: #1a73e8;
  --color-primary-dark: #1558b0;
  --color-primary-light: #4a94f0;
  --color-primary-bg: rgba(26, 115, 232, 0.08);
  --color-secondary: #ff6b35;
  --color-secondary-dark: #d4521e;
  --color-secondary-light: #ff8a5c;
  --color-secondary-bg: rgba(255, 107, 53, 0.08);
  --color-dark: #1a1a2e;
  --color-dark-soft: #2d2d44;
  --color-light: #f8f9fa;
  --color-light-alt: #eef1f5;

  /* Neutrals */
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #eeeeee;
  --color-gray-300: #e0e0e0;
  --color-gray-400: #bdbdbd;
  --color-gray-500: #9e9e9e;
  --color-gray-600: #757575;
  --color-gray-700: #616161;
  --color-gray-800: #424242;
  --color-gray-900: #212121;

  /* Status Colors */
  --color-success: #0d9e5f;
  --color-success-bg: rgba(13, 158, 95, 0.08);
  --color-error: #dc3545;
  --color-error-bg: rgba(220, 53, 69, 0.08);
  --color-warning: #f0ad4e;
  --color-warning-bg: rgba(240, 173, 78, 0.08);
  --color-info: #17a2b8;
  --color-info-bg: rgba(23, 162, 184, 0.08);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-heading: 'Inter', var(--font-primary);
  --font-mono: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;
  --line-height-tight: 1.2;
  --line-height-base: 1.6;
  --line-height-loose: 1.8;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --border-color: var(--color-gray-200);
  --border-width: 1px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08), 0 4px 6px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --header-height: 64px;
  --sidebar-width: 260px;
  --container-max: 1200px;
  --container-narrow: 800px;

  /* Z-index layers */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-header: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-toast: 600;
  --z-chat: 700;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

img,
video,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

fieldset {
  border: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: var(--space-8) 0;
}

::selection {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-dark);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-md); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-gray-700);
}

p:last-child {
  margin-bottom: 0;
}

small {
  font-size: var(--font-size-sm);
}

strong {
  font-weight: 600;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.15em 0.4em;
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  color: var(--color-secondary);
}

pre {
  font-family: var(--font-mono);
  background: var(--color-dark);
  color: var(--color-light);
  padding: var(--space-6);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-6);
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
  background: var(--color-primary-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-gray-800);
}

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }
.text-muted { color: var(--color-gray-500); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================================
   Layout / Container / Grid
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--space-4) * -0.5);
}

.col {
  flex: 1 1 0%;
  padding: 0 calc(var(--space-4) * 0.5);
  min-width: 0;
}

.col-auto { flex: 0 0 auto; width: auto; }
.col-12 { flex: 0 0 100%; max-width: 100%; }
.col-6  { flex: 0 0 50%;  max-width: 50%; }
.col-4  { flex: 0 0 33.333%; max-width: 33.333%; }
.col-3  { flex: 0 0 25%;  max-width: 25%; }
.col-8  { flex: 0 0 66.666%; max-width: 66.666%; }
.col-9  { flex: 0 0 75%;  max-width: 75%; }

[class*="col-"] {
  padding: 0 calc(var(--space-4) * 0.5);
}

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Utility spacing */
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mr-2 { margin-right: var(--space-2); }
.mr-4 { margin-right: var(--space-4); }
.ml-2 { margin-left: var(--space-2); }
.ml-auto { margin-left: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }
.py-16 { padding-top: var(--space-16); padding-bottom: var(--space-16); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }

.w-full { width: 100%; }
.h-full { height: 100%; }
.d-none { display: none; }
.d-block { display: block; }
.d-inline-block { display: inline-block; }
.overflow-hidden { overflow: hidden; }
.relative { position: relative; }

.section {
  padding: var(--space-16) 0;
}

.section-alt {
  background: var(--color-light);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2, .section-header .section-title {
  margin-bottom: var(--space-3);
}

.section-header p, .section-header .section-desc {
  max-width: 600px;
  margin: 0 auto;
  color: var(--color-gray-600);
}

/* ============================================================
   Header / Navigation
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-white);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-dark);
  text-decoration: none;
  flex-shrink: 0;
}

.navbar-brand:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.navbar-brand img {
  height: 36px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  text-decoration: none;
}

.nav-links a.active {
  font-weight: 600;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Hamburger */
.navbar-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.navbar-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.navbar-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav overlay */
.navbar-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  z-index: var(--z-overlay);
  padding: var(--space-6);
  overflow-y: auto;
  flex-direction: column;
  gap: var(--space-2);
  animation: slideDown var(--transition-base);
}

.navbar-menu.open {
  display: flex;
}

.navbar-menu .nav-links a {
  font-size: var(--font-size-md);
  padding: var(--space-3) var(--space-4);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero-section {
  position: relative;
  padding: var(--space-24) 0;
  background: linear-gradient(135deg, var(--color-dark) 0%, #16213e 50%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(26, 115, 232, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 107, 53, 0.1) 0%, transparent 40%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-content h1, .hero-title {
  font-size: var(--font-size-4xl);
  color: var(--color-white);
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.hero-content p, .hero-subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-8);
  line-height: var(--line-height-loose);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.hero-center {
  text-align: center;
}

.hero-center .hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-center .hero-actions {
  justify-content: center;
}

.hero-small {
  padding: var(--space-12) 0;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.25rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1.4;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  user-select: none;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled,
.btn.is-disabled {
  opacity: 0.5;
  pointer-events: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
}

.btn-secondary {
  background: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.btn-secondary:hover {
  background: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  color: var(--color-white);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-outline-light {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-light:hover {
  background: var(--color-white);
  color: var(--color-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--color-gray-700);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-dark);
}

.btn-danger {
  background: var(--color-error);
  color: var(--color-white);
  border-color: var(--color-error);
}

.btn-danger:hover {
  background: #c82333;
  border-color: #c82333;
  color: var(--color-white);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: var(--font-size-base);
}

.btn-block {
  width: 100%;
}

.btn-icon {
  padding: 0.5rem;
  width: 40px;
  height: 40px;
}

.btn-group {
  display: inline-flex;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.btn-group .btn + .btn {
  margin-left: -2px;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-cover {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--color-gray-100);
}

.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card-cover img {
  transform: scale(1.04);
}

.card-badge-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent);
  display: flex;
  align-items: flex-end;
  padding: var(--space-4);
}

.card-body {
  padding: var(--space-6);
}

.card-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-dark);
}

.card-title a {
  color: inherit;
  text-decoration: none;
}

.card-title a:hover {
  color: var(--color-primary);
}

.card-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Course card specifics */
.card-course .card-body {
  display: flex;
  flex-direction: column;
}

.card-course .card-meta {
  margin-top: auto;
  padding-top: var(--space-4);
}

/* Horizontal card */
.card-horizontal {
  display: flex;
}

.card-horizontal .card-cover {
  flex: 0 0 200px;
  aspect-ratio: auto;
}

.card-horizontal .card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Card grid */
.card-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

/* ============================================================
   Price Display
   ============================================================ */
.price {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
}

.price-current {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-secondary);
}

.price-original {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  text-decoration: line-through;
}

.price-discount {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-white);
  background: var(--color-secondary);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
}

.price-free .price-current {
  color: var(--color-success);
}

.price-lg .price-current {
  font-size: var(--font-size-2xl);
}

/* ============================================================
   Badges / Tags
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2em 0.6em;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  line-height: 1.4;
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.badge-secondary {
  background: var(--color-secondary-bg);
  color: var(--color-secondary);
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-error {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: #8a6d3b;
}

.badge-info {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.badge-dark {
  background: var(--color-dark);
  color: var(--color-white);
}

.badge-outline {
  background: transparent;
  border: 1px solid currentColor;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-xs);
  font-weight: 500;
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
}

.tag:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  text-decoration: none;
}

.tag-active {
  background: var(--color-primary);
  color: var(--color-white);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--space-2);
}

.form-label.required::after {
  content: ' *';
  color: var(--color-error);
}

.form-control {
  display: block;
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-gray-900);
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.form-control::placeholder {
  color: var(--color-gray-400);
}

.form-control:disabled,
.form-control[readonly] {
  background: var(--color-gray-100);
  opacity: 0.7;
  cursor: not-allowed;
}

.form-control.error, .form-control-error {
  border-color: var(--color-error);
}

.form-control.error:focus, .form-control-error:focus {
  box-shadow: 0 0 0 3px var(--color-error-bg);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23757575' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.5rem;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.form-check label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  cursor: pointer;
}

/* File Upload */
.file-upload {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-6);
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--radius-lg);
  background: var(--color-gray-50);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  text-align: center;
}

.file-upload:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.file-upload input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-upload-icon {
  font-size: 2rem;
  color: var(--color-gray-400);
  margin-bottom: var(--space-3);
}

.file-upload-text {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.file-upload-text strong {
  color: var(--color-primary);
}

/* Search form */
.search-form {
  display: flex;
  max-width: 480px;
  width: 100%;
}

.search-form .form-control {
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.search-form .btn {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  flex-shrink: 0;
}

/* Inline form */
.form-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: flex-end;
}

.form-inline .form-group {
  margin-bottom: 0;
}

/* ============================================================
   Tables
   ============================================================ */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.table th,
.table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.table th {
  font-weight: 600;
  color: var(--color-gray-700);
  background: var(--color-gray-50);
  white-space: nowrap;
}

.table tbody tr {
  transition: background var(--transition-fast);
}

.table tbody tr:hover {
  background: var(--color-gray-50);
}

.table-striped tbody tr:nth-child(even) {
  background: var(--color-gray-50);
}

.table-bordered th,
.table-bordered td {
  border: 1px solid var(--border-color);
}

.table .actions {
  display: flex;
  gap: var(--space-2);
  white-space: nowrap;
}

/* ============================================================
   Alerts / Notifications
   ============================================================ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-4);
  border: 1px solid transparent;
  animation: alertSlideIn var(--transition-base);
}

@keyframes alertSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.alert-icon {
  flex-shrink: 0;
  font-size: 1.25rem;
  line-height: 1;
}

.alert-content {
  flex: 1;
  min-width: 0;
}

.alert-title-text {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.alert-close {
  flex-shrink: 0;
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
  line-height: 1;
  padding: 0;
}

.alert-close:hover {
  opacity: 1;
}

.alert-success {
  background: var(--color-success-bg);
  border-color: rgba(13, 158, 95, 0.2);
  color: #065f3a;
}

.alert-error {
  background: var(--color-error-bg);
  border-color: rgba(220, 53, 69, 0.2);
  color: #842029;
}

.alert-warning {
  background: var(--color-warning-bg);
  border-color: rgba(240, 173, 78, 0.2);
  color: #664d03;
}

.alert-info {
  background: var(--color-info-bg);
  border-color: rgba(23, 162, 184, 0.2);
  color: #0c5460;
}

/* Flash messages container */
.flash-messages {
  position: fixed;
  top: calc(var(--header-height) + var(--space-4));
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 420px;
  width: 100%;
  pointer-events: none;
}

.flash-messages .alert {
  pointer-events: auto;
  box-shadow: var(--shadow-lg);
}

/* ============================================================
   Modal / Dialog
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal-overlay.is-active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-base);
}

.modal-overlay.is-active .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-size: 1.25rem;
  color: var(--color-gray-500);
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-800);
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-color);
}

.modal-lg {
  max-width: 800px;
}

.modal-sm {
  max-width: 400px;
}

/* ============================================================
   Breadcrumb
   ============================================================ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: var(--font-size-sm);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-gray-500);
}

.breadcrumb li a {
  color: var(--color-gray-600);
  text-decoration: none;
}

.breadcrumb li a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  color: var(--color-gray-400);
  margin-left: var(--space-1);
}

.breadcrumb li:last-child, .breadcrumb li.active {
  color: var(--color-gray-800);
  font-weight: 500;
}

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-6) 0;
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.page-link:hover {
  background: var(--color-gray-100);
  border-color: var(--color-gray-300);
  text-decoration: none;
  color: var(--color-dark);
}

.page-link.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.page-link.active:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
}

.page-link.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.pagination-ellipsis {
  padding: 0 var(--space-2);
  color: var(--color-gray-400);
}

/* ============================================================
   Tabs
   ============================================================ */
.tab-nav, .filter-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: var(--space-6);
  overflow-x: auto;
}

.tab-btn, .filter-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  text-decoration: none;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.tab-btn:hover, .filter-tab:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.tab-btn.active, .filter-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: tabFadeIn var(--transition-base);
}

@keyframes tabFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ============================================================
   Accordion / Collapse
   ============================================================ */
.accordion {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid var(--border-color);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-dark);
  background: var(--color-white);
  cursor: pointer;
  border: none;
  text-align: left;
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: var(--color-gray-50);
}

.accordion-icon {
  transition: transform var(--transition-base);
  flex-shrink: 0;
  font-size: 0.75rem;
  color: var(--color-gray-500);
}

.accordion-item.is-open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow) ease;
}

.accordion-body-inner {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-gray-700);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-loose);
}

/* ============================================================
   Toast Notification
   ============================================================ */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-dark);
  color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  pointer-events: auto;
  animation: toastIn var(--transition-base);
  max-width: 380px;
  min-width: 250px;
}

.toast.is-leaving {
  animation: toastOut var(--transition-base) forwards;
}

.toast-success { background: var(--color-success); }
.toast-error   { background: var(--color-error); }
.toast-warning { background: #b8860b; }
.toast-info    { background: var(--color-info); }

.toast-dismiss {
  margin-left: auto;
  background: none;
  border: none;
  color: inherit;
  opacity: 0.7;
  cursor: pointer;
  padding: 0 0 0 var(--space-2);
  font-size: 1.1rem;
  line-height: 1;
}

.toast-dismiss:hover {
  opacity: 1;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(40px); }
}

/* ============================================================
   User Dashboard Layout
   ============================================================ */
.dashboard {
  display: flex;
  min-height: calc(100vh - var(--header-height));
}

.dashboard-sidebar {
  width: var(--sidebar-width);
  background: var(--color-white);
  border-right: 1px solid var(--border-color);
  padding: var(--space-6) 0;
  flex-shrink: 0;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
}

.dashboard-content {
  flex: 1;
  padding: var(--space-8);
  background: var(--color-light);
  min-width: 0;
}

.sidebar-nav-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  padding: var(--space-2) var(--space-6);
  margin-top: var(--space-4);
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  border-left: 3px solid transparent;
}

.sidebar-nav-link:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
  text-decoration: none;
}

.sidebar-nav-link.active {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: 600;
}

.sidebar-nav-badge {
  margin-left: auto;
  background: var(--color-error);
  color: var(--color-white);
  font-size: var(--font-size-xs);
  padding: 0.1rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.dashboard-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  border: 1px solid var(--border-color);
}

.dashboard-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.dashboard-card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
}

/* Stat cards */
.stat-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-bottom: var(--space-6);
}

.stat-card {
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-2);
}

.stat-number {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-dark);
}

.stat-card-change {
  font-size: var(--font-size-xs);
  margin-top: var(--space-2);
}

.stat-card-change-up { color: var(--color-success); }
.stat-card-change-down { color: var(--color-error); }

/* ============================================================
   Admin Panel Layout
   ============================================================ */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: var(--sidebar-width);
  background: var(--color-dark);
  color: var(--color-white);
  flex-shrink: 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  overflow-y: auto;
  z-index: var(--z-sticky);
}

.admin-sidebar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-white);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.admin-sidebar__nav {
  padding: var(--space-4) 0;
}

.admin-nav__title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.4);
  padding: var(--space-4) var(--space-6) var(--space-2);
}

.admin-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.admin-nav__link:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}

.admin-nav__link--active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.12);
  border-left: 3px solid var(--color-primary-light);
}

.admin-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-8);
  background: var(--color-white);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.admin-content {
  padding: var(--space-8);
  background: var(--color-light);
  min-height: calc(100vh - var(--header-height));
}

.admin-page-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-16) 0 0;
}

.footer-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
  margin-bottom: var(--space-12);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .brand-text {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-brand p, .footer-about {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  line-height: var(--line-height-loose);
}

.footer-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-5);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-6) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-bottom p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.4);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 1.25rem;
  transition: color var(--transition-fast);
  text-decoration: none;
}

.footer-social a:hover {
  color: var(--color-white);
}

/* ============================================================
   Loading / Skeleton
   ============================================================ */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner-sm { width: 16px; height: 16px; border-width: 2px; }
.spinner-lg { width: 40px; height: 40px; border-width: 4px; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  gap: var(--space-3);
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
}

.skeleton {
  background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

.skeleton-text {
  height: 1em;
  width: 100%;
  margin-bottom: var(--space-2);
}

.skeleton-text:last-child {
  width: 60%;
}

.skeleton-heading {
  height: 1.5em;
  width: 40%;
  margin-bottom: var(--space-4);
}

.skeleton-image {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.skeleton-button {
  height: 40px;
  width: 120px;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================================
   AI Chat Widget
   ============================================================ */
.ai-chat-fab {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-chat);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  border: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.ai-chat-fab:hover {
  transform: scale(1.08);
  box-shadow: var(--shadow-xl);
}

.ai-chat-fab.hidden {
  display: none;
}

.ai-chat-panel {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-chat);
  width: 380px;
  height: 520px;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
}

.ai-chat-panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.ai-chat-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
}

.ai-chat-panel-title {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.ai-chat-panel-title small {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

.ai-chat-panel-close {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.15);
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: background var(--transition-fast);
}

.ai-chat-panel-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.ai-chat-panel-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  scroll-behavior: smooth;
}

.chat-message {
  display: flex;
  gap: var(--space-2);
  max-width: 85%;
  animation: messageIn var(--transition-base);
}

@keyframes messageIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.chat-message-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chat-msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.chat-message-ai .chat-msg-avatar {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.chat-message-user .chat-msg-avatar {
  background: var(--color-secondary-bg);
  color: var(--color-secondary);
}

.chat-msg-content {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  word-wrap: break-word;
}

.chat-message-ai .chat-msg-content {
  background: var(--color-gray-100);
  color: var(--color-gray-800);
  border-bottom-left-radius: var(--radius-sm);
}

.chat-message-user .chat-msg-content {
  background: var(--color-primary);
  color: var(--color-white);
  border-bottom-right-radius: var(--radius-sm);
}

/* Typing indicator */
.chat-typing {
  display: flex;
  gap: 4px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: var(--radius-sm);
  width: fit-content;
}

.chat-typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gray-400);
  animation: typingBounce 1.4s ease-in-out infinite;
}

.chat-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.chat-typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-4px); }
}

.ai-chat-panel-input {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border-color);
}

.ai-chat-panel-input input {
  flex: 1;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-full);
  padding: 0.5rem 1rem;
  font-size: var(--font-size-sm);
  outline: none;
  transition: border-color var(--transition-fast);
}

.ai-chat-panel-input input:focus {
  border-color: var(--color-primary);
}

.chat-send-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.chat-send-btn:hover {
  background: var(--color-primary-dark);
}

.chat-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ============================================================
   Back to Top
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  left: var(--space-6);
  z-index: var(--z-dropdown);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-white);
  color: var(--color-gray-700);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ============================================================
   Avatar
   ============================================================ */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-gray-200);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  flex-shrink: 0;
}

.avatar--sm { width: 32px; height: 32px; font-size: var(--font-size-xs); }
.avatar--lg { width: 56px; height: 56px; font-size: var(--font-size-lg); }
.avatar--xl { width: 80px; height: 80px; font-size: var(--font-size-2xl); }

/* ============================================================
   Empty State
   ============================================================ */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-6);
  color: var(--color-gray-500);
}

.empty-state__icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.4;
}

.empty-state__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.empty-state__text {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-6);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   Dropdown
   ============================================================ */
.user-dropdown {
  position: relative;
  display: inline-block;
}

.user-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  z-index: var(--z-dropdown);
  min-width: 200px;
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}

.user-dropdown.open .user-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: background var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.user-dropdown-menu a:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
  text-decoration: none;
}

.user-dropdown-menu hr {
  height: 1px;
  background: var(--border-color);
  margin: var(--space-2) 0;
}

/* ============================================================
   Confirm Dialog
   ============================================================ */
.confirm-dialog .modal-body {
  text-align: center;
  padding: var(--space-8) var(--space-6);
}

.confirm-dialog-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  color: var(--color-warning);
}

.confirm-dialog-message {
  font-size: var(--font-size-base);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.confirm-dialog .modal-footer {
  justify-content: center;
}

/* ============================================================
   Responsive Breakpoints
   ============================================================ */

/* Small devices (576px+) */
@media (min-width: 576px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .col-sm-6 { flex: 0 0 50%; max-width: 50%; }
  .col-sm-12 { flex: 0 0 100%; max-width: 100%; }
}

/* Medium devices (768px+) */
@media (min-width: 768px) {
  :root {
    --header-height: 72px;
  }

  h1 { font-size: var(--font-size-4xl); }

  .container {
    padding: 0 var(--space-6);
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .d-md-none { display: none; }
  .d-md-block { display: block; }
  .d-md-flex { display: flex; }
  .col-md-4 { flex: 0 0 33.333%; max-width: 33.333%; }
  .col-md-6 { flex: 0 0 50%; max-width: 50%; }
  .col-md-8 { flex: 0 0 66.666%; max-width: 66.666%; }
  .col-md-12 { flex: 0 0 100%; max-width: 100%; }
}

/* Large devices (992px+) */
@media (min-width: 992px) {
  .navbar-toggle {
    display: none;
  }

  .nav-links {
    display: flex;
  }

  .card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .card-grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }

  .hero-content h1, .hero-title {
    font-size: 3.5rem;
  }

  .col-lg-3 { flex: 0 0 25%; max-width: 25%; }
  .col-lg-4 { flex: 0 0 33.333%; max-width: 33.333%; }
  .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
  .col-lg-8 { flex: 0 0 66.666%; max-width: 66.666%; }
  .col-lg-9 { flex: 0 0 75%; max-width: 75%; }
}

/* Extra large devices (1200px+) */
@media (min-width: 1200px) {
  .card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .col-xl-3 { flex: 0 0 25%; max-width: 25%; }
  .col-xl-4 { flex: 0 0 33.333%; max-width: 33.333%; }
  .col-xl-6 { flex: 0 0 50%; max-width: 50%; }
}

/* Mobile overrides (below 992px) */
@media (max-width: 991.98px) {
  .navbar-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
  }

  .dashboard {
    flex-direction: column;
  }

  .dashboard-sidebar {
    width: 100%;
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4) 0;
  }

  .dashboard-content {
    padding: var(--space-4);
  }

  /* Admin on mobile */
  .admin-sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

  .admin-sidebar.is-open {
    transform: translateX(0);
  }

  .admin-main {
    margin-left: 0;
  }

  .admin-content {
    padding: var(--space-4);
  }
}

/* Small mobile (below 576px) */
@media (max-width: 575.98px) {
  .hero-section {
    padding: var(--space-12) 0;
  }

  .hero-content h1, .hero-title {
    font-size: var(--font-size-2xl);
  }

  .hero-content p, .hero-subtitle {
    font-size: var(--font-size-base);
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .card-horizontal {
    flex-direction: column;
  }

  .card-horizontal .card-cover {
    flex: none;
    aspect-ratio: 16 / 9;
  }

  .ai-chat-panel {
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    border-radius: 0;
  }

  .section {
    padding: var(--space-10) 0;
  }

  .table th,
  .table td {
    padding: 0.5rem 0.625rem;
  }

  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
  }

  .toast {
    max-width: 100%;
  }

  .modal {
    border-radius: var(--radius-lg);
    margin: var(--space-4);
  }

  .stat-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============================================================
   Animations
   ============================================================ */
.fade-in {
  animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.slide-up {
  animation: slideUp var(--transition-base);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   Print Styles
   ============================================================ */
@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  .site-header,
  .site-footer,
  .ai-chat-fab,
  .ai-chat-panel,
  .back-to-top,
  .toast-container,
  .flash-messages,
  .navbar-toggle,
  .navbar-menu,
  .btn,
  .pagination,
  .admin-sidebar,
  .dashboard-sidebar {
    display: none !important;
  }

  .dashboard-content,
  .admin-main,
  .admin-content {
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
  }

  a[href]::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
    color: #666;
  }

  nav a[href]::after {
    content: none;
  }

  h1, h2, h3, h4 {
    page-break-after: avoid;
  }

  img, table, figure {
    page-break-inside: avoid;
  }

  table {
    border-collapse: collapse;
  }

  table th,
  table td {
    border: 1px solid #ccc !important;
    padding: 0.5em;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }
}

/* ============================================================
   Navbar (HTML: header.php structure)
   ============================================================ */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 700;
  flex-shrink: 0;
}

.brand-text {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-dark);
}

.brand-text small {
  font-size: var(--font-size-xs);
  font-weight: 400;
  color: var(--color-gray-500);
  margin-left: var(--space-1);
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.navbar-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.navbar-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  text-decoration: none;
}

.nav-links a.active {
  font-weight: 600;
}

.nav-ai-btn {
  background: var(--color-primary-bg) !important;
  color: var(--color-primary) !important;
  font-weight: 600 !important;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.user-dropdown {
  position: relative;
  display: inline-block;
}

.user-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.user-dropdown-toggle:hover {
  background: var(--color-gray-100);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.user-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-800);
}

.user-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  z-index: var(--z-dropdown);
  min-width: 180px;
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}

.user-dropdown.open .user-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: background var(--transition-fast);
}

.user-dropdown-menu a:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
  text-decoration: none;
}

.user-dropdown-menu hr {
  height: 1px;
  background: var(--border-color);
  margin: var(--space-2) 0;
  border: none;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* ============================================================
   Hero Stats (homepage)
   ============================================================ */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  margin-top: var(--space-10);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat-number {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-white);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================================
   Section More Link
   ============================================================ */
.section-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  margin-top: var(--space-4);
  transition: color var(--transition-fast);
}

.section-more:hover {
  color: var(--color-primary-dark);
  text-decoration: none;
}

/* ============================================================
   Card Grid 2-col
   ============================================================ */
.card-grid-2 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .card-grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================================
   Card enhancements for HTML classes
   ============================================================ */
.card a {
  text-decoration: none;
  color: inherit;
}

.card-cover {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--color-gray-100);
}

.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card-cover img {
  transform: scale(1.04);
}

.card-cover-wide {
  aspect-ratio: 2 / 1;
}

.card-badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: 0.2em 0.6em;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-white);
  z-index: 1;
}

.badge-source-openclaw {
  background: var(--color-secondary) !important;
}

.badge-source-official {
  background: var(--color-primary) !important;
}

.badge-source-community {
  background: var(--color-success) !important;
}

.card-instructor {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.card-difficulty {
  display: inline-flex;
  align-items: center;
  padding: 0.15em 0.5em;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.badge-beginner {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-intermediate {
  background: var(--color-warning-bg);
  color: #8a6d3b;
}

.badge-advanced {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.card-price {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.card-views {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-left: auto;
}

.card-location {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-2);
}

.card-location svg {
  flex-shrink: 0;
}

.card-cooperation {
  margin-top: var(--space-2);
}

.tag-cooperation {
  display: inline-flex;
  align-items: center;
  padding: 0.2em 0.6em;
  font-size: var(--font-size-xs);
  font-weight: 600;
  background: var(--color-info-bg);
  color: var(--color-info);
  border-radius: var(--radius-full);
}

.btn-text {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 500;
}

.card-skill,
.card-park {
  display: block;
  text-decoration: none;
  color: inherit;
}

/* ============================================================
   Features Grid (homepage)
   ============================================================ */
.features-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 576px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-block {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.feature-block:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.feature-icon-ai {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.feature-icon-skills {
  background: var(--color-secondary-bg);
  color: var(--color-secondary);
}

.feature-icon-opc {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.feature-icon-dist {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.feature-block h3 {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-2);
}

.feature-block p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: var(--line-height-loose);
}

/* ============================================================
   SEO Content Section
   ============================================================ */
.section-seo-content {
  padding: var(--space-12) 0;
  background: var(--color-white);
}

.seo-content {
  max-width: 900px;
  margin: 0 auto;
}

.seo-content h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-6);
  text-align: center;
}

.seo-content p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: var(--line-height-loose);
  margin-bottom: var(--space-4);
  text-indent: 2em;
}

/* ============================================================
   Footer Columns (HTML: footer.php)
   ============================================================ */
.footer-col {
  min-width: 0;
}

.footer-about {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  line-height: var(--line-height-loose);
  margin-bottom: var(--space-4);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-contact li {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.footer-contact strong {
  color: rgba(255, 255, 255, 0.8);
}

.footer-seo-text {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.3);
}

/* ============================================================
   Breadcrumb Bar
   ============================================================ */
.breadcrumb-bar {
  background: var(--color-light);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  font-size: var(--font-size-sm);
  list-style: none;
  margin: 0;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  color: var(--color-gray-500);
}

.breadcrumb li a {
  color: var(--color-gray-600);
  text-decoration: none;
}

.breadcrumb li a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  color: var(--color-gray-400);
  margin-left: var(--space-2);
}

.breadcrumb li:last-child,
.breadcrumb li.active {
  color: var(--color-gray-800);
  font-weight: 500;
}

/* ============================================================
   Page Layout (sidebar + content)
   ============================================================ */
.page-layout {
  display: flex;
  gap: var(--space-8);
  padding: var(--space-8) 0;
}

.page-content {
  flex: 1;
  min-width: 0;
}

.page-sidebar {
  flex: 0 0 280px;
  min-width: 0;
}

@media (max-width: 991.98px) {
  .page-layout {
    flex-direction: column;
  }

  .page-sidebar {
    flex: none;
    width: 100%;
  }
}

/* ============================================================
   Sidebar Widgets
   ============================================================ */
.sidebar-widget {
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
}

.widget-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-dark);
}

.widget-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.widget-list a {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.widget-list a:hover,
.widget-list a.active {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  text-decoration: none;
}

.widget-courses {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.widget-courses li a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.widget-courses li a:hover {
  background: var(--color-gray-50);
  text-decoration: none;
}

.widget-thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-gray-100);
}

.hot-rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--color-gray-200);
  color: var(--color-gray-700);
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.widget-courses li:nth-child(1) .hot-rank { background: var(--color-secondary); color: var(--color-white); }
.widget-courses li:nth-child(2) .hot-rank { background: var(--color-primary); color: var(--color-white); }
.widget-courses li:nth-child(3) .hot-rank { background: var(--color-info); color: var(--color-white); }

.hot-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.hot-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-dark);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hot-price {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-secondary);
}

/* ============================================================
   Filter Tabs & Search Bar
   ============================================================ */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.filter-tab:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  text-decoration: none;
}

.filter-tab.active {
  background: var(--color-primary);
  color: var(--color-white);
}

.search-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.search-bar .search-form {
  display: flex;
  gap: 0;
  flex: 1;
  max-width: 480px;
}

.search-input {
  flex: 1;
  padding: 0.625rem 0.875rem;
  font-size: var(--font-size-base);
  border: 1px solid var(--color-gray-300);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: var(--color-primary);
}

.search-bar .btn {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  flex-shrink: 0;
}

.search-result-info {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* ============================================================
   Detail Page Hero
   ============================================================ */
.detail-hero {
  background: linear-gradient(135deg, var(--color-dark) 0%, #16213e 100%);
  padding: var(--space-12) 0;
  color: var(--color-white);
}

.detail-hero-park {
  background: linear-gradient(135deg, #0d4a2a 0%, #16213e 100%);
}

.detail-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: start;
}

@media (min-width: 768px) {
  .detail-hero-grid {
    grid-template-columns: 400px 1fr;
  }
}

.detail-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-gray-800);
}

.detail-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.detail-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-white);
  margin: 0;
  line-height: var(--line-height-tight);
}

.detail-category-badge {
  display: inline-flex;
  align-self: flex-start;
  padding: 0.25em 0.75em;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-white);
}

.detail-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.detail-meta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.8);
}

.detail-meta strong {
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
}

.detail-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.detail-cooperation {
  display: flex;
  gap: var(--space-2);
}

.detail-compatibility {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-2) var(--space-3);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
}

.detail-price-block {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.detail-price {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-secondary-light);
}

.detail-price-original {
  font-size: var(--font-size-base);
  color: rgba(255, 255, 255, 0.5);
  text-decoration: line-through;
}

.detail-discount {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-white);
  background: var(--color-secondary);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}

.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

/* ============================================================
   Detail Content & Tabs
   ============================================================ */
.detail-content-section {
  padding: var(--space-8) 0;
}

.detail-tabs {
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-color);
  overflow-x: auto;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  background: none;
}

.tab-btn:hover {
  color: var(--color-primary);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.tab-pane {
  display: none;
  padding: var(--space-6);
  animation: tabFadeIn var(--transition-base);
}

.tab-pane.active {
  display: block;
}

.rich-content {
  font-size: var(--font-size-base);
  line-height: var(--line-height-loose);
  color: var(--color-gray-800);
}

.rich-content h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}

.rich-content h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-3);
}

.rich-content p {
  margin-bottom: var(--space-4);
}

.rich-content ul,
.rich-content ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
  list-style: disc;
}

.rich-content ol {
  list-style: decimal;
}

.rich-content li {
  margin-bottom: var(--space-2);
}

.changelog-item {
  padding: var(--space-4);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.changelog-item strong {
  color: var(--color-primary);
}

/* ============================================================
   OPC Parks Filter
   ============================================================ */
.parks-filter {
  padding: var(--space-6) 0;
}

.parks-filter-form {
  margin-bottom: var(--space-4);
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: flex-end;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 160px;
}

.filter-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-700);
}

.filter-group-search {
  flex: 1;
  min-width: 200px;
}

.filter-group-btn {
  flex-direction: row;
  align-items: flex-end;
  gap: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-gray-900);
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23757575' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.5rem;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

@media (max-width: 575.98px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.required {
  color: var(--color-error);
}

/* ============================================================
   Map Placeholder
   ============================================================ */
.map-placeholder {
  background: var(--color-light);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  overflow: hidden;
}

.map-placeholder-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-4);
  text-align: center;
  color: var(--color-gray-500);
}

.map-placeholder-inner p {
  margin-top: var(--space-3);
  font-weight: 500;
}

.map-placeholder-inner small {
  color: var(--color-gray-400);
}

/* ============================================================
   Park Detail Sections
   ============================================================ */
.park-contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
}

.park-contact-info p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

.park-contact-info a {
  color: var(--color-primary-light);
  text-decoration: none;
}

.park-contact-info a:hover {
  text-decoration: underline;
}

.park-map-section {
  margin: var(--space-8) 0;
}

.park-map-section h3 {
  margin-bottom: var(--space-4);
}

.park-contact-form {
  margin: var(--space-8) 0;
  padding: var(--space-8);
  background: var(--color-light);
  border-radius: var(--radius-lg);
}

.park-contact-form h3 {
  margin-bottom: var(--space-2);
}

.contact-form {
  margin-top: var(--space-6);
}

/* ============================================================
   Policies Content
   ============================================================ */
.policies-content {
  margin-top: var(--space-4);
}

.policy-list {
  padding-left: var(--space-6);
  list-style: disc;
}

.policy-list li {
  margin-bottom: var(--space-2);
  color: var(--color-gray-700);
}

/* ============================================================
   AI Chat Widget Wrapper
   ============================================================ */
.ai-chat-widget {
  position: relative;
  z-index: var(--z-chat);
}

.fab-icon {
  font-weight: 700;
  font-size: 1rem;
}

.fab-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--color-primary);
  animation: fabPulse 2s ease-in-out infinite;
  z-index: -1;
}

@keyframes fabPulse {
  0% { transform: scale(1); opacity: 0.4; }
  50% { transform: scale(1.3); opacity: 0; }
  100% { transform: scale(1); opacity: 0; }
}

.chat-ai-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.chat-panel-title h5 {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-white);
}

.chat-panel-title small {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

.chat-panel-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ============================================================
   Mobile Menu Overrides
   ============================================================ */
@media (max-width: 991.98px) {
  .navbar-toggle {
    display: flex;
  }

  .navbar-menu {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    z-index: var(--z-overlay);
    padding: var(--space-6);
    overflow-y: auto;
    flex-direction: column;
    gap: var(--space-4);
    animation: slideDown var(--transition-base);
  }

  .navbar-menu.open {
    display: flex;
  }

  .navbar-menu .nav-links {
    flex-direction: column;
    width: 100%;
  }

  .navbar-menu .nav-links a {
    font-size: var(--font-size-md);
    padding: var(--space-3) var(--space-4);
    width: 100%;
  }

  .navbar-menu .nav-user {
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-color);
  }
}

@media (min-width: 992px) {
  .navbar-toggle {
    display: none;
  }
}

/* ============================================================
   Responsive Footer Grid
   ============================================================ */
@media (min-width: 576px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

@media (min-width: 992px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
}

/* ============================================================
   Responsive Hero
   ============================================================ */
@media (max-width: 575.98px) {
  .hero-section {
    padding: var(--space-12) 0;
  }

  .hero-content h1,
  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .hero-content p,
  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
  }

  .detail-hero-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   Responsive Card Grid 3
   ============================================================ */
@media (min-width: 768px) {
  .card-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================================
   Empty State Enhancement
   ============================================================ */
.empty-state h2 {
  font-size: var(--font-size-lg);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.empty-state p {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-6);
}

.empty-state .btn {
  margin: 0 auto;
}