/* ============================================================
   OBSIDIAN DIGITAL — Premium Design System
   Dark Obsidian Theme | Glassmorphism | Cinematic Animations
   ============================================================ */

/* ---- Google Fonts (loaded in header.php via <link>) ---- */
/* Inter: 300,400,500,600,700 | Plus Jakarta Sans: 500,600,700,800 */

/* ============================================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================ */
:root {
  /* Backgrounds */
  --bg-primary: #0a0a0f;
  --bg-surface: #111118;
  --bg-elevated: #1a1a2e;
  --bg-hover: #1e1e32;
  --bg-input: #14141f;

  /* Accent Colors — Obsidian Digital: Deep gold/amber on obsidian dark */
  --accent: #c9a84c;
  --accent-hover: #e0bc6e;
  --accent-glow: rgba(201,168,76,0.35);
  --accent-violet: #b8973b;
  --accent-gradient: linear-gradient(135deg, #c9a84c 0%, #e0bc6e 50%, #f5d98c 100%);
  --accent-gradient-hover: linear-gradient(135deg, #e0bc6e 0%, #f5d98c 50%, #fff3c4 100%);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0a0a0f;

  /* Status */
  --success: #22c55e;
  --success-bg: rgba(34,197,94,0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245,158,11,0.1);
  --error: #ef4444;
  --error-bg: rgba(239,68,68,0.1);
  --info: #3b82f6;
  --info-bg: rgba(59,130,246,0.1);

  /* Glass */
  --glass-bg: rgba(255,255,255,0.04);
  --glass-bg-hover: rgba(255,255,255,0.07);
  --glass-border: rgba(255,255,255,0.08);
  --glass-border-hover: rgba(255,255,255,0.15);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.4);

  /* Borders */
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.16);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-sans);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 20px var(--accent-glow);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-nav: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-toast: 600;

  /* Container */
  --container-max: 1280px;
  --container-padding: 1.5rem;

  /* Sidebar */
  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
}

/* ============================================================
   PAGE LOADER — Obsidian Digital Cinematic Intro
   ============================================================ */
#obsidian-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #070709;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#obsidian-loader.fade-out {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.loader-logo-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
  overflow: hidden;
}
.loader-icon {
  width: 54px;
  height: 54px;
  animation: loaderIconDrop 0.7s cubic-bezier(0.34,1.56,0.64,1) 0.1s both;
}
.loader-brand {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.loader-brand-name {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #f1f5f9;
  animation: loaderSlideUp 0.65s cubic-bezier(0.34,1.56,0.64,1) 0.25s both;
}
.loader-brand-name span {
  background: linear-gradient(135deg, #c9a84c 0%, #e0bc6e 50%, #f5d98c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.loader-brand-tagline {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #64748b;
  animation: loaderSlideUp 0.65s cubic-bezier(0.34,1.56,0.64,1) 0.4s both;
}
.loader-bar-wrap {
  width: 200px;
  height: 2px;
  background: rgba(255,255,255,0.07);
  border-radius: 99px;
  overflow: hidden;
  animation: loaderFadeIn 0.5s ease 0.5s both;
}
.loader-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #c9a84c, #f5d98c, #c9a84c);
  background-size: 200% 100%;
  border-radius: 99px;
  animation: loaderProgress 1.2s ease 0.6s both, loaderShimmer 1.5s linear 0.6s infinite;
}
@keyframes loaderIconDrop {
  from { opacity:0; transform: translateY(-30px) scale(0.6); }
  to   { opacity:1; transform: translateY(0) scale(1); }
}
@keyframes loaderSlideUp {
  from { opacity:0; transform: translateY(20px); }
  to   { opacity:1; transform: translateY(0); }
}
@keyframes loaderFadeIn {
  from { opacity:0; } to { opacity:1; }
}
@keyframes loaderProgress {
  from { width: 0%; } to { width: 100%; }
}
@keyframes loaderShimmer {
  0%   { background-position: 200% center; }
  100% { background-position: -200% center; }
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 5rem;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-hover); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; color: var(--text-primary); }

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

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-elevated); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
.text-display { font-family: var(--font-display); font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 800; line-height: 1.05; letter-spacing: -0.03em; }
.text-h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; letter-spacing: -0.02em; }
.text-h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; letter-spacing: -0.01em; }
.text-h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); font-weight: 600; }
.text-h4 { font-size: 1.125rem; font-weight: 600; }
.text-body { font-size: 1rem; line-height: 1.6; }
.text-body-sm { font-size: 0.875rem; line-height: 1.5; }
.text-caption { font-size: 0.75rem; line-height: 1.4; color: var(--text-muted); }
.text-overline { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent); }
.text-gradient { background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* ============================================================
   4. LAYOUT
   ============================================================ */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); width: 100%; }
.container-sm { max-width: 640px; margin: 0 auto; padding: 0 var(--container-padding); }
.container-lg { max-width: 1440px; margin: 0 auto; padding: 0 var(--container-padding); }

.section { padding: var(--space-4xl) 0; }
.section-header { text-align: center; margin-bottom: var(--space-3xl); }
.section-header h2 { margin-bottom: var(--space-md); }
.section-header p { color: var(--text-secondary); max-width: 600px; margin: 0 auto; font-size: 1.125rem; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

/* Grid */
.grid { display: grid; gap: var(--space-lg); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .section { padding: var(--space-2xl) 0; }
}
@media (max-width: 480px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
}

.w-full { width: 100%; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }

/* ============================================================
   5. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem; border-radius: var(--radius-md); font-weight: 600; font-size: 0.875rem;
  min-height: 44px; transition: all var(--transition-base); position: relative; overflow: hidden;
  white-space: nowrap; border: 1px solid transparent; letter-spacing: 0.02em; text-transform: uppercase;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent-gradient); color: white; border: none;
  box-shadow: 0 4px 15px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-primary:hover { box-shadow: 0 6px 25px var(--accent-glow); transform: translateY(-2px); color: white; }

.btn-secondary {
  background: var(--glass-bg); color: var(--text-primary);
  border: 1px solid var(--glass-border); backdrop-filter: blur(12px);
}
.btn-secondary:hover { background: var(--glass-bg-hover); border-color: var(--glass-border-hover); color: var(--text-primary); }

.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { background: var(--glass-bg); color: var(--text-primary); }

.btn-danger { background: var(--error); color: white; }
.btn-danger:hover { background: #dc2626; color: white; }

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #16a34a; color: white; }

.btn-sm { padding: 0.5rem 1rem; font-size: 0.8125rem; min-height: 36px; }
.btn-lg { padding: 1rem 2.5rem; font-size: 1rem; min-height: 52px; }
.btn-icon { width: 44px; height: 44px; padding: 0; border-radius: var(--radius-md); }
.btn-icon.btn-sm { width: 36px; height: 36px; }

.btn-group { display: flex; gap: var(--space-sm); }
@media (max-width: 480px) { .btn-group { flex-direction: column; } .btn-group .btn { width: 100%; } }

/* Button Loading Animation */
.btn-loading { pointer-events: none; position: relative; color: transparent !important; }
.btn-loading::after {
  content: ''; position: absolute; width: 20px; height: 20px; border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white; border-radius: 50%; animation: spin 0.6s linear infinite;
}

/* Shimmer effect on buttons */
.btn-primary::before {
  content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.5s;
}
.btn-primary:hover::before { left: 100%; }

/* ============================================================
   6. FORM CONTROLS
   ============================================================ */
.form-group { margin-bottom: var(--space-lg); }
.form-label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); margin-bottom: var(--space-sm); }
.form-required { color: var(--error); margin-left: 2px; }

.form-control {
  width: 100%; padding: 0.75rem 1rem; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-md); color: var(--text-primary); font-size: 1rem; min-height: 44px;
  transition: all var(--transition-fast); outline: none;
}
.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-control::placeholder { color: var(--text-muted); }
.form-control:disabled { opacity: 0.5; cursor: not-allowed; }
.form-control.error { border-color: var(--error); }

textarea.form-control { min-height: 120px; resize: vertical; }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; padding-right: 2.5rem; }

.form-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: var(--space-xs); }
.form-error { font-size: 0.75rem; color: var(--error); margin-top: var(--space-xs); display: flex; align-items: center; gap: 0.25rem; }

/* Checkbox & Radio */
.form-check { display: flex; align-items: flex-start; gap: var(--space-sm); cursor: pointer; min-height: 44px; padding: 0.5rem 0; }
.form-check input[type="checkbox"], .form-check input[type="radio"] {
  width: 20px; height: 20px; margin-top: 2px; accent-color: var(--accent); cursor: pointer; flex-shrink: 0;
}
.form-check-label { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.4; }

/* Toggle Switch */
.toggle { position: relative; width: 44px; height: 24px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0; background: var(--bg-elevated); border-radius: var(--radius-full);
  cursor: pointer; transition: var(--transition-base); border: 1px solid var(--border);
}
.toggle-slider::before {
  content: ''; position: absolute; width: 18px; height: 18px; left: 2px; bottom: 2px;
  background: var(--text-secondary); border-radius: 50%; transition: var(--transition-base);
}
.toggle input:checked + .toggle-slider { background: var(--accent); border-color: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); background: white; }

/* Password Strength */
.password-strength { display: flex; gap: 4px; margin-top: var(--space-sm); }
.password-strength-bar { height: 4px; flex: 1; border-radius: 2px; background: var(--bg-elevated); transition: var(--transition-base); }
.password-strength-bar.weak { background: var(--error); }
.password-strength-bar.fair { background: var(--warning); }
.password-strength-bar.good { background: var(--info); }
.password-strength-bar.strong { background: var(--success); }

/* File Upload */
.file-upload {
  border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: var(--space-2xl);
  text-align: center; cursor: pointer; transition: all var(--transition-base); background: var(--glass-bg);
}
.file-upload:hover, .file-upload.dragover { border-color: var(--accent); background: rgba(99,102,241,0.05); }
.file-upload-icon { font-size: 2rem; color: var(--text-muted); margin-bottom: var(--space-md); }
.file-upload-text { color: var(--text-secondary); }
.file-upload-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: var(--space-sm); }

/* ============================================================
   7. CARDS
   ============================================================ */
.card {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-xl);
  padding: var(--space-xl); transition: all var(--transition-base);
}
.card:hover { border-color: var(--border-hover); }
.card-glass {
  background: var(--glass-bg); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border); border-radius: var(--radius-xl); padding: var(--space-xl);
  transition: all var(--transition-base); box-shadow: var(--glass-shadow);
}
.card-glass:hover { background: var(--glass-bg-hover); border-color: var(--glass-border-hover); }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-lg); }
.card-title { font-size: 1.125rem; font-weight: 600; }

/* Metric Card */
.metric-card {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-xl);
  padding: var(--space-xl); transition: all var(--transition-base);
}
.metric-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,0,0,0.3); }
.metric-label { font-size: 0.8125rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 500; }
.metric-value { font-family: var(--font-display); font-size: 2rem; font-weight: 800; margin-top: var(--space-sm); letter-spacing: -0.02em; }
.metric-change { font-size: 0.8125rem; margin-top: var(--space-xs); }
.metric-change.up { color: var(--success); }
.metric-change.down { color: var(--error); }

/* ============================================================
   8. NAVIGATION
   ============================================================ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-nav);
  padding: 1rem 0; transition: all var(--transition-base);
}
.navbar.scrolled {
  background: rgba(10,10,15,0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border); padding: 0.75rem 0;
}
.navbar-inner { display: flex; align-items: center; justify-content: space-between; }

.navbar-logo { font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; display: flex; align-items: center; gap: 0.5rem; }
.navbar-logo span { background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.navbar-menu { display: flex; align-items: center; gap: var(--space-xl); }
.navbar-link { font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); transition: color var(--transition-fast); padding: 0.5rem 0; position: relative; }
.navbar-link:hover, .navbar-link.active { color: var(--text-primary); }
.navbar-link.active::after { content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 2px; background: var(--accent-gradient); border-radius: 1px; }

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

/* Mobile Menu */
.hamburger { display: none; flex-direction: column; gap: 5px; width: 28px; cursor: pointer; padding: 8px; z-index: calc(var(--z-nav) + 10); }
.hamburger span { display: block; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all var(--transition-base); }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  position: fixed; inset: 0; background: rgba(10,10,15,0.98); z-index: var(--z-overlay);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-xl);
  opacity: 0; visibility: hidden; transition: all var(--transition-slow);
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu a { font-family: var(--font-display); font-size: 1.75rem; font-weight: 700; color: var(--text-primary); transition: color var(--transition-fast); }
.mobile-menu a:hover { color: var(--accent-hover); }

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .navbar-menu { display: none; }
  .navbar-actions .btn { display: none; }
}

/* ============================================================
   9. HERO SECTION
   ============================================================ */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; position: relative;
  overflow: hidden; padding: var(--space-5xl) 0;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 50%, rgba(139,92,246,0.1) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 100%, rgba(99,102,241,0.05) 0%, transparent 50%);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-particles { position: absolute; inset: 0; z-index: 0; overflow: hidden; }

.hero-content { position: relative; z-index: 1; text-align: center; max-width: 900px; margin: 0 auto; }
.hero-overline { display: inline-block; padding: 0.5rem 1.25rem; border-radius: var(--radius-full); background: var(--glass-bg); border: 1px solid var(--glass-border); font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-hover); margin-bottom: var(--space-xl); backdrop-filter: blur(8px); }
.hero-title { font-family: var(--font-display); font-size: clamp(2.5rem, 7vw, 5rem); font-weight: 800; line-height: 1.05; letter-spacing: -0.04em; margin-bottom: var(--space-lg); }
.hero-subtitle { font-size: clamp(1rem, 2vw, 1.25rem); color: var(--text-secondary); line-height: 1.6; max-width: 600px; margin: 0 auto var(--space-2xl); }
.hero-cta { display: flex; align-items: center; justify-content: center; gap: var(--space-md); flex-wrap: wrap; }

@media (max-width: 480px) {
  .hero { min-height: 90vh; padding: var(--space-3xl) 0; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
}

/* ============================================================
   10. PRODUCT / BOOK CARDS
   ============================================================ */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }
@media (max-width: 1024px) { .product-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .product-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; } }

.product-card {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-xl);
  overflow: hidden; transition: all var(--transition-base); position: relative;
  perspective: 1000px;
}
.product-card:hover { border-color: var(--border-hover); transform: translateY(-4px); box-shadow: var(--shadow-lg), 0 0 40px rgba(99,102,241,0.1); }

.product-card-cover {
  position: relative; aspect-ratio: 3/4; overflow: hidden; background: var(--bg-elevated);
}
.product-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.product-card:hover .product-card-cover img { transform: scale(1.05); }

.product-card-badge {
  position: absolute; top: 0.75rem; left: 0.75rem; padding: 0.25rem 0.75rem; border-radius: var(--radius-full);
  font-size: 0.6875rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
}
.product-card-badge.bestseller { background: var(--accent-gradient); color: white; }
.product-card-badge.new { background: var(--success); color: white; }
.product-card-badge.sale { background: var(--error); color: white; }
.product-card-badge.limited { background: var(--warning); color: var(--text-inverse); }

.product-card-wishlist {
  position: absolute; top: 0.75rem; right: 0.75rem; width: 36px; height: 36px; border-radius: 50%;
  background: rgba(0,0,0,0.5); backdrop-filter: blur(8px); display: flex; align-items: center;
  justify-content: center; color: var(--text-primary); transition: all var(--transition-fast); cursor: pointer;
}
.product-card-wishlist:hover { background: var(--error); }
.product-card-wishlist.active { background: var(--error); }

.product-card-body { padding: var(--space-lg); }
.product-card-category { font-size: 0.75rem; color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-xs); }
.product-card-title { font-size: 1rem; font-weight: 600; margin-bottom: var(--space-xs); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.4; }
.product-card-author { font-size: 0.8125rem; color: var(--text-muted); margin-bottom: var(--space-md); }

.product-card-footer { display: flex; align-items: center; justify-content: space-between; }
.product-card-price { font-family: var(--font-display); font-weight: 700; font-size: 1.125rem; }
.product-card-price .original { text-decoration: line-through; color: var(--text-muted); font-size: 0.875rem; font-weight: 400; margin-left: 0.5rem; }
.product-card-price .discount { color: var(--success); font-size: 0.75rem; font-weight: 600; margin-left: 0.5rem; }

.product-card-rating { display: flex; align-items: center; gap: 0.25rem; color: var(--warning); font-size: 0.75rem; }

/* 3D Book Card Effect */
.book-3d-wrapper { perspective: 1000px; }
.book-3d {
  transform-style: preserve-3d; transition: transform 0.4s ease;
  will-change: transform;
}
.book-3d:hover { transform: rotateY(-8deg) rotateX(3deg) translateZ(10px); }

@media (hover: none) {
  .book-3d:hover { transform: none; }
  .product-card:hover { transform: translateY(-2px); }
}

/* ============================================================
   11. PRODUCT DETAIL PAGE
   ============================================================ */
.product-detail { padding-top: 6rem; }
.product-detail-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: var(--space-3xl); align-items: start; }
@media (max-width: 768px) { .product-detail-grid { grid-template-columns: 1fr; } }

.product-cover-3d {
  perspective: 1200px; display: flex; justify-content: center; padding: var(--space-2xl);
}
.product-cover-3d img {
  max-width: 360px; width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-xl), 20px 20px 60px rgba(0,0,0,0.5);
  transform: rotateY(-5deg); transition: transform 0.5s ease;
}
.product-cover-3d:hover img { transform: rotateY(0deg) scale(1.02); }

.product-meta { display: flex; flex-wrap: wrap; gap: var(--space-md); margin-bottom: var(--space-lg); }
.product-meta-item { display: flex; align-items: center; gap: var(--space-sm); font-size: 0.875rem; color: var(--text-secondary); }

.product-price-section { margin-bottom: var(--space-xl); }
.product-price { font-family: var(--font-display); font-size: 2.5rem; font-weight: 800; }
.product-price-original { font-size: 1.25rem; color: var(--text-muted); text-decoration: line-through; margin-left: var(--space-md); font-weight: 400; }
.product-discount-badge { display: inline-block; padding: 0.25rem 0.75rem; background: var(--success-bg); color: var(--success); border-radius: var(--radius-full); font-size: 0.8125rem; font-weight: 600; margin-left: var(--space-md); }

.product-actions { display: flex; gap: var(--space-md); margin-bottom: var(--space-2xl); }
@media (max-width: 768px) {
  .product-actions { position: fixed; bottom: 0; left: 0; right: 0; padding: var(--space-md) var(--space-lg); background: rgba(10,10,15,0.95); backdrop-filter: blur(20px); border-top: 1px solid var(--border); z-index: var(--z-sticky); }
}

.product-features { list-style: none; }
.product-features li { display: flex; align-items: flex-start; gap: var(--space-sm); padding: var(--space-sm) 0; color: var(--text-secondary); font-size: 0.9375rem; }
.product-features li::before { content: '✓'; color: var(--success); font-weight: 700; flex-shrink: 0; }

/* ============================================================
   12. CATEGORIES GRID
   ============================================================ */
.category-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-md); }
@media (max-width: 1024px) { .category-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) { .category-grid { grid-template-columns: repeat(2, 1fr); } }

.category-card {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-xl);
  padding: var(--space-xl); text-align: center; transition: all var(--transition-base); cursor: pointer;
}
.category-card:hover { border-color: var(--accent); transform: translateY(-4px); background: var(--bg-elevated); box-shadow: 0 0 30px rgba(99,102,241,0.1); }
.category-icon { width: 48px; height: 48px; border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; margin: 0 auto var(--space-md); background: var(--glass-bg); color: var(--accent); font-size: 1.25rem; }
.category-card:hover .category-icon { background: rgba(99,102,241,0.15); }
.category-name { font-weight: 600; font-size: 0.875rem; }
.category-count { font-size: 0.75rem; color: var(--text-muted); margin-top: var(--space-xs); }

/* ============================================================
   13. BADGES & TAGS
   ============================================================ */
.badge {
  display: inline-flex; align-items: center; gap: 0.25rem; padding: 0.25rem 0.75rem; border-radius: var(--radius-full);
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em;
}
.badge-primary { background: rgba(99,102,241,0.15); color: var(--accent-hover); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--error-bg); color: var(--error); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-secondary { background: var(--glass-bg); color: var(--text-secondary); }

.tag { display: inline-flex; align-items: center; padding: 0.375rem 0.75rem; background: var(--glass-bg); border: 1px solid var(--border); border-radius: var(--radius-full); font-size: 0.8125rem; color: var(--text-secondary); transition: all var(--transition-fast); }
.tag:hover { background: var(--glass-bg-hover); border-color: var(--border-hover); color: var(--text-primary); }

/* ============================================================
   14. TABLES
   ============================================================ */
.table-wrapper { overflow-x: auto; border-radius: var(--radius-xl); border: 1px solid var(--border); }
.table { width: 100%; border-collapse: collapse; }
.table th { text-align: left; padding: 0.875rem 1rem; font-size: 0.75rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; background: var(--bg-surface); border-bottom: 1px solid var(--border); white-space: nowrap; }
.table td { padding: 0.875rem 1rem; font-size: 0.875rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table tr:hover td { background: var(--glass-bg); }
.table tr:last-child td { border-bottom: none; }

/* ============================================================
   15. PAGINATION
   ============================================================ */
.pagination { display: flex; align-items: center; justify-content: center; gap: var(--space-sm); padding: var(--space-xl) 0; }
.pagination-btn {
  display: flex; align-items: center; justify-content: center; min-width: 40px; height: 40px; padding: 0 0.75rem;
  border-radius: var(--radius-md); font-size: 0.875rem; font-weight: 500; color: var(--text-secondary);
  background: var(--bg-surface); border: 1px solid var(--border); transition: all var(--transition-fast);
}
.pagination-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }
.pagination-btn.active { background: var(--accent); border-color: var(--accent); color: white; }
.pagination-btn.disabled { opacity: 0.4; pointer-events: none; }

/* ============================================================
   16. MODAL
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(4px);
  z-index: var(--z-modal); display: flex; align-items: center; justify-content: center; padding: var(--space-lg);
  opacity: 0; visibility: hidden; transition: all var(--transition-base);
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-xl);
  width: 100%; max-width: 560px; max-height: 90vh; overflow-y: auto; transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-spring); box-shadow: var(--shadow-xl);
}
.modal-overlay.open .modal { transform: scale(1) translateY(0); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-xl); border-bottom: 1px solid var(--border); }
.modal-title { font-size: 1.125rem; font-weight: 600; }
.modal-close { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-md); color: var(--text-muted); transition: all var(--transition-fast); }
.modal-close:hover { background: var(--glass-bg); color: var(--text-primary); }
.modal-body { padding: var(--space-xl); }
.modal-footer { display: flex; gap: var(--space-md); justify-content: flex-end; padding: var(--space-xl); border-top: 1px solid var(--border); }

/* ============================================================
   17. TOAST NOTIFICATIONS
   ============================================================ */
.toast-container { position: fixed; top: var(--space-xl); right: var(--space-xl); z-index: var(--z-toast); display: flex; flex-direction: column; gap: var(--space-sm); pointer-events: none; }
@media (max-width: 480px) { .toast-container { top: var(--space-md); right: var(--space-md); left: var(--space-md); } }
.toast {
  padding: 0.875rem 1.25rem; border-radius: var(--radius-lg); display: flex; align-items: center; gap: var(--space-md);
  font-size: 0.875rem; font-weight: 500; pointer-events: auto; min-width: 300px; max-width: 450px;
  box-shadow: var(--shadow-lg); animation: toastIn 0.3s ease; border: 1px solid var(--border);
  background: var(--bg-elevated);
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--error); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info { border-left: 3px solid var(--info); }

/* ============================================================
   18. SKELETON LOADING
   ============================================================ */
.skeleton { background: var(--bg-elevated); border-radius: var(--radius-md); position: relative; overflow: hidden; }
.skeleton::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.04), transparent);
  animation: shimmer 1.5s infinite;
}
.skeleton-text { height: 1rem; width: 100%; margin-bottom: var(--space-sm); }
.skeleton-text.sm { width: 60%; }
.skeleton-title { height: 1.5rem; width: 80%; margin-bottom: var(--space-md); }
.skeleton-image { aspect-ratio: 3/4; width: 100%; }
.skeleton-card { height: 320px; border-radius: var(--radius-xl); }

/* ============================================================
   19. AUTH PAGES
   ============================================================ */
.auth-page { min-height: 100vh; display: flex; }
.auth-brand {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: var(--space-3xl);
  background: radial-gradient(ellipse at center, rgba(99,102,241,0.15) 0%, var(--bg-primary) 70%);
  position: relative; overflow: hidden;
}
.auth-brand-content { position: relative; z-index: 1; text-align: center; max-width: 400px; }
.auth-brand h1 { font-size: 2.5rem; margin-bottom: var(--space-md); }
.auth-brand p { color: var(--text-secondary); font-size: 1.125rem; }

.auth-form-side { flex: 1; display: flex; align-items: center; justify-content: center; padding: var(--space-2xl); }
.auth-form-card { width: 100%; max-width: 440px; }
.auth-form-card h2 { font-size: 1.75rem; margin-bottom: var(--space-sm); }
.auth-form-card .subtitle { color: var(--text-secondary); margin-bottom: var(--space-2xl); }

.auth-divider { display: flex; align-items: center; gap: var(--space-md); margin: var(--space-xl) 0; }
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.auth-divider span { font-size: 0.8125rem; color: var(--text-muted); }

.social-login { display: flex; flex-direction: column; gap: var(--space-sm); }
.social-btn {
  display: flex; align-items: center; justify-content: center; gap: var(--space-sm); padding: 0.75rem;
  border: 1px solid var(--border); border-radius: var(--radius-md); font-weight: 500; font-size: 0.875rem;
  transition: all var(--transition-fast); min-height: 44px; background: var(--glass-bg);
}
.social-btn:hover { border-color: var(--border-hover); background: var(--glass-bg-hover); }

.auth-footer { text-align: center; margin-top: var(--space-xl); font-size: 0.875rem; color: var(--text-secondary); }
.auth-footer a { color: var(--accent); font-weight: 500; }

@media (max-width: 768px) {
  .auth-page { flex-direction: column; }
  .auth-brand { display: none; }
  .auth-form-side { padding: var(--space-lg); }
}

/* ============================================================
   20. CHECKOUT
   ============================================================ */
.checkout-page { padding-top: 6rem; min-height: 100vh; }
.checkout-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--space-3xl); align-items: start; }
@media (max-width: 768px) { .checkout-grid { grid-template-columns: 1fr; } }

.checkout-summary {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-xl);
  padding: var(--space-xl); position: sticky; top: 6rem;
}
.checkout-item { display: flex; gap: var(--space-lg); padding: var(--space-lg) 0; border-bottom: 1px solid var(--border); }
.checkout-item-cover { width: 80px; height: 100px; border-radius: var(--radius-md); overflow: hidden; flex-shrink: 0; background: var(--bg-elevated); }
.checkout-item-cover img { width: 100%; height: 100%; object-fit: cover; }
.checkout-total { display: flex; justify-content: space-between; padding: var(--space-lg) 0; font-size: 1.25rem; font-weight: 700; }

/* ============================================================
   21. ACCOUNT LAYOUT
   ============================================================ */
.account-page { padding-top: 6rem; min-height: 100vh; }
.account-grid { display: grid; grid-template-columns: 240px 1fr; gap: var(--space-2xl); }
@media (max-width: 768px) { .account-grid { grid-template-columns: 1fr; } }

.account-sidebar { position: sticky; top: 6rem; }
.account-nav a { display: flex; align-items: center; gap: var(--space-sm); padding: 0.75rem var(--space-md); border-radius: var(--radius-md); font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); transition: all var(--transition-fast); }
.account-nav a:hover { color: var(--text-primary); background: var(--glass-bg); }
.account-nav a.active { color: var(--accent); background: rgba(99,102,241,0.1); }

/* ============================================================
   22. DOWNLOAD ANIMATION
   ============================================================ */
.download-progress { max-width: 400px; margin: 0 auto; padding: var(--space-3xl); text-align: center; }
.download-progress-ring { width: 120px; height: 120px; margin: 0 auto var(--space-xl); position: relative; }
.download-progress-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.download-progress-ring circle { fill: none; stroke-width: 4; stroke-linecap: round; }
.download-progress-ring .bg { stroke: var(--bg-elevated); }
.download-progress-ring .progress { stroke: var(--accent); stroke-dasharray: 339.292; stroke-dashoffset: 339.292; transition: stroke-dashoffset 0.5s ease; }
.download-progress-percent { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; }
.download-step { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: var(--space-md); min-height: 1.5rem; }
.download-step.active { color: var(--accent); }
.download-step.done { color: var(--success); }
.download-filename { font-weight: 600; margin-top: var(--space-lg); }

/* ============================================================
   23. TESTIMONIALS
   ============================================================ */
.testimonial-carousel { position: relative; overflow: hidden; }
.testimonial-track { display: flex; transition: transform 0.5s ease; }
.testimonial-card { min-width: 100%; padding: 0 var(--space-md); }
@media (min-width: 768px) { .testimonial-card { min-width: 50%; } }
@media (min-width: 1024px) { .testimonial-card { min-width: 33.333%; } }

.testimonial-inner {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-xl);
  padding: var(--space-xl); height: 100%;
}
.testimonial-stars { color: var(--warning); margin-bottom: var(--space-md); font-size: 0.875rem; letter-spacing: 0.1em; }
.testimonial-text { color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.7; margin-bottom: var(--space-lg); font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: var(--space-md); }
.testimonial-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--accent-gradient); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.125rem; color: white; }
.testimonial-name { font-weight: 600; font-size: 0.875rem; }
.testimonial-title { font-size: 0.75rem; color: var(--text-muted); }

/* ============================================================
   24. FAQ ACCORDION
   ============================================================ */
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-lg); margin-bottom: var(--space-sm); overflow: hidden; transition: border-color var(--transition-fast); }
.faq-item.active { border-color: var(--accent); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between; padding: var(--space-lg); cursor: pointer;
  font-weight: 600; font-size: 0.9375rem; min-height: 56px; transition: background var(--transition-fast);
}
.faq-question:hover { background: var(--glass-bg); }
.faq-icon { width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; transition: transform var(--transition-base); color: var(--text-muted); flex-shrink: 0; }
.faq-item.active .faq-icon { transform: rotate(180deg); color: var(--accent); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; }
.faq-answer-inner { padding: 0 var(--space-lg) var(--space-lg); color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.7; }

/* ============================================================
   25. FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--border); padding: var(--space-4xl) 0 var(--space-xl);
  background: var(--bg-surface);
}
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: var(--space-2xl); margin-bottom: var(--space-3xl); }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand p { color: var(--text-secondary); font-size: 0.875rem; margin-top: var(--space-md); line-height: 1.6; max-width: 300px; }
.footer-heading { font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); margin-bottom: var(--space-lg); }
.footer-links a { display: block; padding: 0.375rem 0; color: var(--text-secondary); font-size: 0.875rem; transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--text-primary); }

.footer-social { display: flex; gap: var(--space-md); margin-top: var(--space-lg); }
.footer-social a { width: 40px; height: 40px; border-radius: var(--radius-md); background: var(--glass-bg); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); transition: all var(--transition-fast); }
.footer-social a:hover { background: var(--accent); border-color: var(--accent); color: white; }

.footer-bottom { border-top: 1px solid var(--border); padding-top: var(--space-xl); display: flex; align-items: center; justify-content: space-between; font-size: 0.8125rem; color: var(--text-muted); }
@media (max-width: 480px) { .footer-bottom { flex-direction: column; gap: var(--space-md); text-align: center; } }

/* ============================================================
   26. STORE SIDEBAR (Filters)
   ============================================================ */
.store-layout { display: grid; grid-template-columns: 260px 1fr; gap: var(--space-2xl); }
@media (max-width: 768px) { .store-layout { grid-template-columns: 1fr; } }

.store-sidebar { position: sticky; top: 6rem; height: fit-content; }
@media (max-width: 768px) { .store-sidebar { display: none; } .store-sidebar.open { display: block; position: fixed; inset: 0; z-index: var(--z-overlay); background: var(--bg-primary); padding: var(--space-xl); overflow-y: auto; } }

.filter-group { margin-bottom: var(--space-xl); }
.filter-group-title { font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: var(--space-md); }
.filter-option { display: flex; align-items: center; gap: var(--space-sm); padding: 0.5rem 0; cursor: pointer; font-size: 0.875rem; color: var(--text-secondary); }
.filter-option:hover { color: var(--text-primary); }
.filter-option.active { color: var(--accent); }

.store-toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-xl); gap: var(--space-md); flex-wrap: wrap; }
.store-count { font-size: 0.875rem; color: var(--text-muted); }
.store-sort select { background: var(--bg-surface); border: 1px solid var(--border); color: var(--text-primary); padding: 0.5rem 2rem 0.5rem 0.75rem; border-radius: var(--radius-md); font-size: 0.8125rem; }

/* ============================================================
   27. ERROR PAGES
   ============================================================ */
.error-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: var(--space-2xl); }
.error-code { font-family: var(--font-display); font-size: clamp(5rem, 15vw, 10rem); font-weight: 800; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; }
.error-message { font-size: 1.25rem; color: var(--text-secondary); margin: var(--space-lg) 0 var(--space-2xl); }

/* ============================================================
   28. STATS / COUNTERS
   ============================================================ */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }
@media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
.stat-card { text-align: center; padding: var(--space-xl); }
.stat-value { font-family: var(--font-display); font-size: 2.5rem; font-weight: 800; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { font-size: 0.875rem; color: var(--text-muted); margin-top: var(--space-sm); }

/* ============================================================
   29. CTA BANNER
   ============================================================ */
.cta-banner {
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-2xl);
  padding: var(--space-4xl) var(--space-2xl); text-align: center; position: relative; overflow: hidden;
}
.cta-banner::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(99,102,241,0.1) 0%, transparent 70%);
}
.cta-banner > * { position: relative; z-index: 1; }
.cta-banner h2 { margin-bottom: var(--space-md); }
.cta-banner p { color: var(--text-secondary); margin-bottom: var(--space-xl); max-width: 500px; margin-left: auto; margin-right: auto; }

/* ============================================================
   30. SEARCH
   ============================================================ */
.search-bar { position: relative; max-width: 480px; width: 100%; }
.search-bar input { padding-left: 3rem; padding-right: 3rem; }
.search-bar-icon { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); }
.search-results-dropdown {
  position: absolute; top: calc(100% + 0.5rem); left: 0; right: 0; background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-xl);
  max-height: 400px; overflow-y: auto; z-index: var(--z-dropdown); display: none;
}
.search-results-dropdown.open { display: block; }
.search-result-item { display: flex; align-items: center; gap: var(--space-md); padding: 0.75rem var(--space-lg); transition: background var(--transition-fast); cursor: pointer; }
.search-result-item:hover { background: var(--glass-bg); }

/* ============================================================
   31. EMPTY STATES
   ============================================================ */
.empty-state { text-align: center; padding: var(--space-4xl) var(--space-xl); }
.empty-state-icon { font-size: 3rem; color: var(--text-muted); margin-bottom: var(--space-lg); opacity: 0.5; }
.empty-state h3 { margin-bottom: var(--space-sm); }
.empty-state p { color: var(--text-secondary); margin-bottom: var(--space-xl); max-width: 400px; margin-left: auto; margin-right: auto; }

/* ============================================================
   32. ALERT MESSAGES
   ============================================================ */
.alert { padding: var(--space-md) var(--space-lg); border-radius: var(--radius-lg); font-size: 0.875rem; display: flex; align-items: flex-start; gap: var(--space-md); margin-bottom: var(--space-lg); }
.alert-success { background: var(--success-bg); border: 1px solid rgba(34,197,94,0.2); color: var(--success); }
.alert-error { background: var(--error-bg); border: 1px solid rgba(239,68,68,0.2); color: var(--error); }
.alert-warning { background: var(--warning-bg); border: 1px solid rgba(245,158,11,0.2); color: var(--warning); }
.alert-info { background: var(--info-bg); border: 1px solid rgba(59,130,246,0.2); color: var(--info); }

/* ============================================================
   33. ADMIN LAYOUT
   ============================================================ */
.admin-layout { display: flex; min-height: 100vh; }

.admin-sidebar {
  width: var(--sidebar-width); background: var(--bg-surface); border-right: 1px solid var(--border);
  position: fixed; top: 0; left: 0; bottom: 0; overflow-y: auto; z-index: var(--z-nav);
  display: flex; flex-direction: column; transition: width var(--transition-base);
}
.admin-sidebar-header { padding: var(--space-lg); border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: var(--space-sm); }
.admin-sidebar-logo { font-family: var(--font-display); font-weight: 800; font-size: 1.25rem; }

.admin-nav { flex: 1; padding: var(--space-md); overflow-y: auto; }
.admin-nav-section { margin-bottom: var(--space-md); }
.admin-nav-label { font-size: 0.6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); padding: var(--space-sm) var(--space-md); }
.admin-nav-item {
  display: flex; align-items: center; gap: var(--space-sm); padding: 0.625rem var(--space-md);
  border-radius: var(--radius-md); font-size: 0.8125rem; font-weight: 500; color: var(--text-secondary);
  transition: all var(--transition-fast); margin-bottom: 2px;
}
.admin-nav-item:hover { background: var(--glass-bg); color: var(--text-primary); }
.admin-nav-item.active { background: rgba(99,102,241,0.1); color: var(--accent); }
.admin-nav-icon { width: 20px; height: 20px; opacity: 0.7; flex-shrink: 0; }

.admin-main { flex: 1; margin-left: var(--sidebar-width); }
.admin-topbar {
  position: sticky; top: 0; z-index: var(--z-sticky); padding: var(--space-md) var(--space-xl);
  background: rgba(10,10,15,0.85); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.admin-content { padding: var(--space-xl); }
.admin-page-header { margin-bottom: var(--space-xl); }
.admin-page-title { font-size: 1.5rem; font-weight: 700; }
.admin-page-subtitle { color: var(--text-muted); font-size: 0.875rem; margin-top: var(--space-xs); }

@media (max-width: 1024px) {
  .admin-sidebar { transform: translateX(-100%); z-index: var(--z-overlay); }
  .admin-sidebar.open { transform: translateX(0); }
  .admin-main { margin-left: 0; }
}

/* ============================================================
   34. ANIMATIONS
   ============================================================ */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }
@keyframes toastIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toastOut { from { transform: translateX(0); opacity: 1; } to { transform: translateX(100%); opacity: 0; } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes float { 0%, 100% { transform: translateY(0px); } 50% { transform: translateY(-10px); } }
@keyframes gradientShift { 0% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }
@keyframes shake { 0%, 100% { transform: translateX(0); } 10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); } 20%, 40%, 60%, 80% { transform: translateX(4px); } }
@keyframes checkmark { 0% { stroke-dashoffset: 100; } 100% { stroke-dashoffset: 0; } }
@keyframes successPulse { 0% { box-shadow: 0 0 0 0 rgba(34,197,94,0.4); } 70% { box-shadow: 0 0 0 15px rgba(34,197,94,0); } 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0); } }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Button login animation */
.btn-auth-animate { position: relative; overflow: hidden; }
.btn-auth-animate .btn-text { transition: all var(--transition-base); }
.btn-auth-animate.loading .btn-text { opacity: 0; }
.btn-auth-animate .btn-spinner { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity var(--transition-base); }
.btn-auth-animate.loading .btn-spinner { opacity: 1; }
.btn-auth-animate.success { background: var(--success) !important; animation: successPulse 1s; }
.btn-auth-animate.error { animation: shake 0.5s; }

/* ============================================================
   35. 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; }
  .reveal { opacity: 1; transform: none; }
  .book-3d:hover { transform: none; }
  .product-card:hover { transform: none; }
  .btn-primary:hover { transform: none; }
}

/* ============================================================
   36. PRINT STYLES
   ============================================================ */
@media print {
  .navbar, .footer, .mobile-menu, .hamburger, .toast-container { display: none !important; }
  body { background: white; color: black; }
  .card, .card-glass { border: 1px solid #ddd; background: white; }
}

/* ============================================================
   37. UTILITY CLASSES
   ============================================================ */
.mt-xs { margin-top: var(--space-xs); } .mt-sm { margin-top: var(--space-sm); } .mt-md { margin-top: var(--space-md); } .mt-lg { margin-top: var(--space-lg); } .mt-xl { margin-top: var(--space-xl); } .mt-2xl { margin-top: var(--space-2xl); }
.mb-xs { margin-bottom: var(--space-xs); } .mb-sm { margin-bottom: var(--space-sm); } .mb-md { margin-bottom: var(--space-md); } .mb-lg { margin-bottom: var(--space-lg); } .mb-xl { margin-bottom: var(--space-xl); } .mb-2xl { margin-bottom: var(--space-2xl); }
.p-md { padding: var(--space-md); } .p-lg { padding: var(--space-lg); } .p-xl { padding: var(--space-xl); } .p-2xl { padding: var(--space-2xl); }
.rounded { border-radius: var(--radius-md); } .rounded-lg { border-radius: var(--radius-lg); } .rounded-xl { border-radius: var(--radius-xl); } .rounded-full { border-radius: var(--radius-full); }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.line-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.line-clamp-3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.opacity-50 { opacity: 0.5; }
.pointer { cursor: pointer; }
.no-select { user-select: none; }
.relative { position: relative; }
.overflow-hidden { overflow: hidden; }