/**
 * Yubayyin Group - Core Design System & Global Styles
 */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600;700;800&family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');

:root {
  /* Brand Color Palette - Deep Emerald & Royal Gold */
  --primary-hue: 162;
  --primary-sat: 88%;
  --primary-light: 40%;
  
  --color-emerald-950: #021a14;
  --color-emerald-900: #042920;
  --color-emerald-800: #084335;
  --color-emerald-700: #0d5f4c;
  --color-emerald-600: #107f66;
  --color-emerald-500: #10b981;
  --color-emerald-400: #34d399;
  --color-emerald-300: #6ee7b7;

  --color-gold-900: #593e0b;
  --color-gold-700: #a17015;
  --color-gold-500: #d4af37;
  --color-gold-400: #f3ca40;
  --color-gold-300: #fae084;
  
  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --font-serif: 'Cinzel', serif;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Theme (Default Onyx Luxe) */
[data-theme="dark"] {
  --bg-main: #060b09;
  --bg-surface: #0b1411;
  --bg-surface-elevated: #111d19;
  --bg-glass: rgba(11, 20, 17, 0.75);
  --bg-glass-strong: rgba(6, 11, 9, 0.88);
  --bg-glass-card: rgba(16, 30, 25, 0.55);
  --bg-input: rgba(6, 14, 11, 0.85);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(16, 185, 129, 0.28);
  --border-gold: rgba(212, 175, 55, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-emerald: #34d399;
  --text-gold: #f3ca40;

  --accent-primary: #10b981;
  --accent-secondary: #d4af37;
  --accent-gradient: linear-gradient(135deg, #10b981 0%, #059669 50%, #d4af37 100%);
  --accent-gold-gradient: linear-gradient(135deg, #f3ca40 0%, #d4af37 50%, #aa8012 100%);
  --hero-glow: radial-gradient(circle at 50% 30%, rgba(16, 185, 129, 0.18) 0%, rgba(212, 175, 55, 0.08) 45%, transparent 70%);

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 30px -8px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 20px 50px -12px rgba(0, 0, 0, 0.8);
  --shadow-glow: 0 0 40px rgba(16, 185, 129, 0.22);
}

/* Light Theme (Pearl Luxe) */
[data-theme="light"] {
  --bg-main: #f8faf9;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f0f5f2;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-glass-strong: rgba(255, 255, 255, 0.94);
  --bg-glass-card: rgba(255, 255, 255, 0.9);
  --bg-input: #ffffff;

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(16, 127, 102, 0.25);
  --border-gold: rgba(161, 112, 21, 0.35);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-emerald: #0d5f4c;
  --text-gold: #a17015;

  --accent-primary: #0d5f4c;
  --accent-secondary: #a17015;
  --accent-gradient: linear-gradient(135deg, #0d5f4c 0%, #107f66 60%, #a17015 100%);
  --accent-gold-gradient: linear-gradient(135deg, #a17015 0%, #d4af37 60%, #593e0b 100%);
  --hero-glow: radial-gradient(circle at 50% 30%, rgba(13, 95, 76, 0.1) 0%, rgba(161, 112, 21, 0.06) 45%, transparent 70%);

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 30px -8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 50px -12px rgba(0, 0, 0, 0.14);
  --shadow-glow: 0 0 35px rgba(13, 95, 76, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Background Ambient Texture */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(16, 185, 129, 0.07) 0%, transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(212, 175, 55, 0.05) 0%, transparent 45%);
  pointer-events: none;
  z-index: 0;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

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

ul {
  list-style: none;
}

/* Global Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.container-narrow {
  max-width: 960px;
}

/* Glassmorphism Panel Base */
.glass-panel {
  background: var(--bg-glass-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.glass-panel:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

/* Section Header Structure */
.section-wrapper {
  padding: 6.5rem 0;
  position: relative;
  z-index: 1;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-emerald);
  padding: 0.4rem 1rem;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 1rem;
  background: linear-gradient(180deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: 1.125rem;
  max-width: 680px;
  color: var(--text-secondary);
}

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

.text-center .section-subtitle {
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.5);
  filter: brightness(1.08);
}

.btn-gold {
  background: var(--accent-gold-gradient);
  color: #111827;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.35);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(212, 175, 55, 0.55);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  border-color: var(--text-emerald);
  background: rgba(16, 185, 129, 0.08);
  color: var(--text-emerald);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.55rem 1.15rem;
  font-size: 0.85rem;
  border-radius: 8px;
}

/* Spinner */
.btn-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}

::-webkit-scrollbar-track {
  background: var(--bg-main);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-surface-elevated);
  border-radius: 6px;
  border: 2px solid var(--bg-main);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-emerald-700);
}