/* ==========================================================================
   SDM English Medium School, Ujire - Core Design System 2026
   ========================================================================== */

:root {
  /* Brand Palette */
  --primary-deep: #0e2a47;
  --primary-blue: #1e50bc;
  --sky-blue: #38bdf8;
  --accent-yellow: #facc15;
  --accent-orange: #f97316;
  --accent-green: #10b981;
  --accent-purple: #8b5cf6;
  
  /* Neutrals & Surfaces */
  --bg-light: #f8fafc;
  --bg-surface: #ffffff;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --border-light: #e2e8f0;
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Container Engine */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Glass Floating Navbar */
.site-header {
  position: fixed;
  top: 1rem;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition-smooth);
}

.navbar-inner {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 999px;
  padding: 0.75rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--primary-deep);
  font-weight: 800;
  font-size: 1.15rem;
}

.brand-badge {
  background: linear-gradient(135deg, var(--primary-blue), var(--sky-blue));
  color: white;
  padding: 0.35rem 0.65rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition-fast);
  position: relative;
}

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

/* Hero Section */
.hero-wrapper {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 6rem;
  overflow: hidden;
  background: var(--primary-deep);
  color: white;
}

.hero-video-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 42, 71, 0.4) 0%, rgba(14, 42, 71, 0.95) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent-yellow), var(--accent-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2.25rem;
  font-weight: 400;
}

/* Button System */
.btn-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-orange), #ea580c);
  color: white;
  box-shadow: 0 10px 25px rgba(249, 115, 22, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(249, 115, 22, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: white;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-3px);
}

/* Experiential Grid Section */
.section-padding {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem auto;
}

.section-tag {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  background: rgba(30, 80, 188, 0.1);
  color: var(--primary-blue);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: var(--primary-deep);
  line-height: 1.2;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card-experiential {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  border: 1px solid var(--border-light);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card-experiential:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.card-icon-wrapper {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.75rem;
}

/* Floating Character Callout System */
.character-callout {
  position: relative;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border-radius: var(--radius-lg);
  padding: 2rem;
  gap: 1.5rem;
  margin: 3rem 0;
  border: 2px dashed var(--sky-blue);
}

.character-avatar {
  width: 100px;
  height: 100px;
  flex-shrink: 0;
}

/* Lightbox Base */
.lightbox-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(14, 42, 71, 0.95);
  backdrop-filter: blur(10px);
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox-modal.active {
  display: flex;
}

.lightbox-content {
  max-width: 900px;
  width: 100%;
  position: relative;
}

.lightbox-close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  color: white;
  font-size: 2rem;
  cursor: pointer;
}

/* Accessibility: 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;
  }
}

/* Mobile Responsiveness */
@media (max-width: 992px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
}