/* ==========================================================================
   Readixa Master Design System & Theme Engine (Arabic RTL)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Color Palette - Light Mode */
  --primary: #0d9488;
  --primary-hover: #0f766e;
  --primary-light: rgba(13, 148, 136, 0.12);
  --primary-glow: rgba(13, 148, 136, 0.25);

  --secondary: #2563eb;
  --secondary-hover: #1d4ed8;
  --secondary-light: rgba(37, 99, 235, 0.12);

  --accent: #f97316;
  --accent-hover: #ea580c;
  --accent-light: rgba(249, 115, 22, 0.12);

  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --border-color: #e2e8f0;
  --border-light: #f1f5f9;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(13, 148, 136, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 25px rgba(13, 148, 136, 0.3);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  --nav-height: 76px;
  --dock-height: 64px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --primary: #14b8a6;
  --primary-hover: #2dd4bf;
  --primary-light: rgba(20, 184, 166, 0.12);
  --primary-glow: rgba(20, 184, 166, 0.35);

  --secondary: #3b82f6;
  --secondary-hover: #60a5fa;
  --secondary-light: rgba(59, 130, 246, 0.12);

  --accent: #fb923c;
  --accent-hover: #fdba74;
  --accent-light: rgba(251, 146, 60, 0.12);

  --bg-main: #0b0f19;
  --bg-surface: #111827;
  --bg-glass: rgba(17, 24, 39, 0.85);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;

  --border-color: #1f2937;
  --border-light: #161e2e;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 35px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(20, 184, 166, 0.4);
}

/* Base Reset & Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  direction: rtl;
  text-align: right;
  scroll-behavior: smooth;
  font-size: 16px;
  height: 100%;
}

/* Unified Seamless Global Background Engine */
body {
  font-family: 'Cairo', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(circle at 85% 15%, var(--primary-light) 0%, transparent 45%),
    radial-gradient(circle at 15% 75%, var(--secondary-light) 0%, transparent 45%);
  background-attachment: fixed;
  background-size: cover;
  color: var(--text-main);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);

  &::-webkit-scrollbar {
    width: 8px;
  }
  &::-webkit-scrollbar-track {
    background: var(--bg-main);
  }
  &::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: var(--radius-full);
  }
}

.main-content {
  flex: 1 0 auto;
}

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

/* Container & Layout Spacing - MANDATORY HORIZONTAL PADDING */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(20px, 5vw, 32px) !important;
  padding-right: clamp(20px, 5vw, 32px) !important;
}

.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 26px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #0d9488 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 25px var(--primary-glow);
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, #ea580c 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 25px rgba(249, 115, 22, 0.4);
}

/* Theme Switcher Toggle */
.theme-toggle-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1.1rem;
}

.theme-toggle-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: rotate(15deg);
}

/* Floating Back to Top Button */
.back-to-top-btn {
  position: fixed;
  bottom: 30px;
  left: 30px;
  width: 46px;
  height: 46px;
  background: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-lg);
  border: none;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-fast);
  z-index: 1050;
}

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

.back-to-top-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-4px) scale(1.08);
}

/* Floating Mobile Navigation Dock */
.mobile-dock {
  display: none;
  position: fixed;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 420px;
  height: var(--dock-height);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  z-index: 1000;
  padding: 0 16px;
  align-items: center;
  justify-content: space-around;
}

.dock-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  gap: 3px;
  transition: all var(--transition-fast);
}

.dock-item .dock-icon {
  font-size: 1.2rem;
}

.dock-item.active,
.dock-item:hover {
  color: var(--primary);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .mobile-dock {
    display: flex;
  }
  body {
    padding-bottom: 85px;
  }
  .back-to-top-btn {
    bottom: 88px;
    left: 16px;
  }
}

/* PWA Floating Install Button - Top Left Corner under Navbar */
.pwa-install-container {
  display: none; /* Hidden by default, shown by JS only if PWA supported & not installed */
  position: fixed;
  top: 88px;
  left: 24px;
  z-index: 1050;
}

.btn-install-pwa {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--primary);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  box-shadow: 0 8px 25px rgba(13, 148, 136, 0.25);
  transition: all var(--transition-fast);
}

.btn-install-pwa:hover {
  background: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(13, 148, 136, 0.4);
}

@media (max-width: 768px) {
  .pwa-install-container {
    top: 80px;
    left: 16px;
  }
  .btn-install-pwa span {
    display: none;
  }
  .btn-install-pwa {
    padding: 10px;
    width: 44px;
    height: 44px;
    justify-content: center;
    border-radius: 50%;
  }
}

/* Karaoke Word Highlighting for Fasih Speech */
.word-span {
  display: inline-block;
  padding: 2px 4px;
  border-radius: 4px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--text-main);
}

.word-span.word-active {
  background: linear-gradient(135deg, #00D2A0 0%, #10B981 100%);
  color: #0B132B !important;
  font-weight: 900;
  transform: scale(1.1);
  box-shadow: 0 4px 15px rgba(0, 210, 160, 0.4);
}

/* Pulse Ring Safeguard for Hero Card */
.pulse-ring-active {
  animation: pulseGlow 1.8s infinite;
  border-color: #00D2A0 !important;
}

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 210, 160, 0.6);
  }
  70% {
    box-shadow: 0 0 0 16px rgba(0, 210, 160, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 210, 160, 0);
  }
}

/* Safari iOS Select Dropdown Repair */
select.custom-safari-fix {
  -webkit-appearance: none !important;
  -moz-appearance: none !important;
  appearance: none !important;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2300D2A0'><path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/></svg>") !important;
  background-repeat: no-repeat !important;
  background-position: left 1rem center !important;
  background-size: 1.25rem !important;
  padding-left: 2.75rem !important;
  padding-right: 1rem !important;
  width: 100% !important;
  min-height: 3.25rem !important;
  border-radius: 0.75rem !important;
  color: var(--text-main) !important;
  background-color: var(--bg-main) !important;
  border: 1px solid var(--border-color) !important;
}

select.custom-safari-fix option {
  background-color: var(--bg-surface);
  color: var(--text-main);
  padding: 10px;
}

/* Global Custom Modal Backdrop */
.custom-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.custom-modal-backdrop.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.custom-modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 520px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  transform: scale(0.88);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.custom-modal-backdrop.active .custom-modal-card {
  transform: scale(1);
}