/* ==========================================================================
   CS-CyberVerse M.3 - Main CSS Design System
   Modern Cyber-EdTech Theme with Glassmorphism & Vibrant Gradients
   ========================================================================== */

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

:root {
  --primary-glow: #38bdf8;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-pink: #ec4899;
  --accent-amber: #f59e0b;
  --accent-emerald: #10b981;

  --bg-dark: #090d16;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-glow: rgba(56, 189, 248, 0.4);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-glow: #e0f2fe;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;

  --shadow-neon: 0 0 25px rgba(56, 189, 248, 0.25);
  --shadow-purple: 0 0 25px rgba(139, 92, 246, 0.25);
  --shadow-card: 0 12px 36px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: 'Prompt', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Background Cyber Grid & Ambient Glows */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.15), transparent 40%),
    radial-gradient(circle at 85% 20%, rgba(139, 92, 246, 0.18), transparent 45%),
    radial-gradient(circle at 50% 85%, rgba(236, 72, 153, 0.12), transparent 50%),
    linear-gradient(to bottom, #090d16 0%, #0d1527 100%);
  z-index: -2;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -1;
  pointer-events: none;
}

/* App Navbar */
.app-navbar {
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  padding: 0.85rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.brand-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(56, 189, 248, 0.4));
  transition: transform 0.3s ease;
}

.brand-title-group:hover .brand-logo-img {
  transform: scale(1.08) rotate(-3deg);
}

.modal-logo-img {
  height: 70px;
  width: auto;
  object-fit: contain;
  margin-bottom: 0.8rem;
  filter: drop-shadow(0 4px 12px rgba(56, 189, 248, 0.5));
}

.hero-logo-img {
  max-height: 180px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 10px 25px rgba(56, 189, 248, 0.5));
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.brand-text h1 {
  font-size: 1.35rem;
  font-weight: 700;
  font-family: 'Chakra Petch', 'Prompt', sans-serif;
  background: linear-gradient(90deg, #38bdf8, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
  line-height: 1.2;
}

.brand-text span {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* User Pill Status in Navbar */
.user-pill {
  display: flex;
  align-items: center;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--border-glow);
  padding: 6px 14px;
  border-radius: var(--radius-xl);
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.user-avatar {
  font-size: 1.3rem;
  color: var(--accent-cyan);
  margin-right: 8px;
}

.user-details {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.2;
}

.user-badge {
  font-size: 0.72rem;
  color: var(--accent-amber);
}

/* Page Container & Single Page Views */
.app-main-content {
  padding: 2.5rem 0 5rem 0;
  min-height: calc(100vh - 160px);
}

.app-page {
  display: none;
}

.app-page.active {
  display: block;
}

/* App Hero Banner */
.hero-banner {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.6), rgba(15, 23, 42, 0.8));
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  margin-bottom: 2.5rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.15), transparent 70%);
  border-radius: 50%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #38bdf8;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.hero-title .gradient-text {
  background: linear-gradient(90deg, #38bdf8, #a855f7, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 750px;
  margin-bottom: 1.5rem;
}

/* Modern Glass Cards */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

/* Custom Buttons */
.btn-primary {
  background: linear-gradient(135deg, #0284c7, #2563eb);
  border: none;
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.4rem;
  transition: all 0.25s ease;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1, #1d4ed8);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
  color: #fff;
}

.btn-warning {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  border: none;
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.4rem;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.35);
}

.btn-warning:hover {
  background: linear-gradient(135deg, #d97706, #b45309);
  transform: translateY(-2px);
  color: #fff;
}

/* Footer */
.app-footer {
  background: rgba(9, 13, 22, 0.95);
  border-top: 1px solid var(--border-glass);
  padding: 2rem 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* Responsiveness */
@media (max-width: 768px) {
  .hero-title {
    font-size: 1.6rem;
  }
  .hero-banner {
    padding: 1.5rem 1rem;
  }
}