/* ==========================================================================
   QuranicWords — Master Curriculum Design System & Core Stylesheet
   Designed by DeanyBytes
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Amiri:ital,wght@0,400;0,700;1,400;1,700&family=Cinzel:wght@600;700;900&family=Inter:wght@300;400;500;600;700;800;900&family=Scheherazade+New:wght@400;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Color Palette - Dark Luxury Obsidian & Emerald */
  --bg-base: #06080e;
  --bg-surface: #0c111c;
  --bg-surface-elevated: #121927;
  --bg-card: rgba(18, 25, 39, 0.75);
  --bg-card-hover: rgba(24, 34, 53, 0.9);
  --bg-glass: rgba(12, 17, 28, 0.65);
  
  /* Primary Emerald Brand */
  --primary: #10b981;
  --primary-rgb: 16, 185, 129;
  --primary-hover: #059669;
  --primary-light: rgba(16, 185, 129, 0.15);
  --primary-glow: rgba(16, 185, 129, 0.35);
  
  /* Gold / Accent */
  --accent-gold: #f59e0b;
  --accent-gold-rgb: 245, 158, 11;
  --accent-gold-light: rgba(245, 158, 11, 0.15);
  --accent-gold-glow: rgba(245, 158, 11, 0.3);
  
  /* Secondary / Cyan Accent */
  --accent-cyan: #06b6d4;
  --accent-cyan-light: rgba(6, 182, 212, 0.15);
  
  /* Text Colors */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-arabic: #fef08a;
  
  /* Borders & Glass */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(16, 185, 129, 0.45);
  --border-gold: rgba(245, 158, 11, 0.35);
  --glass-blur: blur(16px);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.25);
  
  /* Typography */
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-arabic: 'Scheherazade New', 'Amiri', serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-display: 'Cinzel', serif;
  
  /* Dimensions & Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --container-max: 1440px;
  --header-height: 74px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.8);
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  --text-arabic: #854d0e;
  --border-subtle: rgba(15, 23, 42, 0.1);
  --border-focus: rgba(16, 185, 129, 0.5);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px rgba(16, 185, 129, 0.15);
}

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

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

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-ui);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(16, 185, 129, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(245, 158, 11, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 50% 80%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Arabic Typography Utility */
.font-arabic {
  font-family: var(--font-arabic);
  direction: rtl;
  font-feature-settings: "cv01", "cv02", "calt";
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* Top App Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--text-main);
  transition: transform var(--transition-fast);
}

.brand:hover {
  transform: translateY(-1px);
}

.brand-logo-wrap {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  overflow: hidden;
  background: #ffffff;
  padding: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px var(--primary-glow);
  flex-shrink: 0;
}

.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-badge {
  font-size: 0.68rem;
  font-weight: 700;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.brand-sub {
  font-size: 0.76rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-1px);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #10b981, #047857);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-gold {
  background: linear-gradient(135deg, var(--accent-gold), #d97706);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px var(--accent-gold-glow);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

/* Language Dropdown / Selector */
.lang-select-wrap {
  position: relative;
}

.lang-select {
  appearance: none;
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 34px 8px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: all var(--transition-fast);
}

.lang-select:hover, .lang-select:focus {
  border-color: var(--primary);
}

.lang-icon-indicator {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* Hero Section */
.hero-section {
  padding: 36px 0 20px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 16px;
  animation: pulse-glow 3s infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.2); }
  50% { box-shadow: 0 0 16px 4px rgba(16, 185, 129, 0.25); }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #0f172a 40%, #475569 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 24px;
}

/* Stat Ribbon */
.stats-ribbon {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  max-width: 960px;
  margin: 0 auto 28px;
}

.stat-chip {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.stat-chip:hover {
  transform: translateY(-2px);
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
}

.stat-val {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  font-feature-settings: "tnum";
}

.stat-val.primary { color: var(--primary); }
.stat-val.gold { color: var(--accent-gold); }
.stat-val.cyan { color: var(--accent-cyan); }

.stat-lbl {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

/* Main Control Bar */
.control-bar-wrap {
  position: sticky;
  top: var(--header-height);
  z-index: 90;
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 0;
  margin-bottom: 24px;
}

.control-bar {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.search-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.search-box-wrap {
  position: relative;
  flex: 1;
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 1.1rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 48px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 0 44px 0 48px;
  color: var(--text-main);
  font-size: 0.98rem;
  font-family: var(--font-ui);
  outline: none;
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.search-clear-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 6px;
  display: none;
  border-radius: var(--radius-full);
}

.search-clear-btn:hover {
  color: var(--text-main);
}

.search-shortcut-badge {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  pointer-events: none;
}

/* Secondary Filter / View Mode Row */
.filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.view-mode-tabs {
  display: flex;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 4px;
  gap: 4px;
}

.view-tab-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.view-tab-btn.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 10px var(--primary-glow);
}

.view-tab-btn:hover:not(.active) {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.filter-selectors {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-select {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
}

.filter-select:hover, .filter-select:focus {
  border-color: var(--primary);
}

/* Loading & Empty State */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  gap: 16px;
  text-align: center;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(16, 185, 129, 0.15);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

/* Footer */
.app-footer {
  margin-top: 80px;
  border-top: 1px solid var(--border-subtle);
  padding: 40px 0 30px;
  background: var(--bg-surface);
  color: var(--text-muted);
  font-size: 0.88rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  .brand-title {
    font-size: 1rem;
  }
  .brand-sub {
    display: none;
  }
  .search-shortcut-badge {
    display: none;
  }
  .stats-ribbon {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .stat-chip {
    padding: 10px 8px;
  }
  .stat-val {
    font-size: 1.15rem;
  }
  .stat-lbl {
    font-size: 0.65rem;
  }
  .view-mode-tabs {
    width: 100%;
    overflow-x: auto;
  }
  .filter-selectors {
    width: 100%;
  }
  .filter-select {
    flex: 1;
  }
}