/* 
  Custom Bootstrap 5 Theme for Student Learning Platform
  Color Palette:
  - Primary: #1b4a5a (Deep Teal)
  - Accent: #feae55 (Golden)
  - Light: #ffeede (Cream)
  - Background: #fafafa (Off White)
*/

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

:root {
  --primary-color: #1b4a5a;
  --primary-dark: #0f2e38;
  --primary-light: #2a6878;
  --accent-color: #feae55;
  --accent-dark: #e89830;
  --accent-light: #ffc57a;
  --light-color: #ffeede;
  --bg-color: #fafafa;
  --white: #ffffff;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
  --text-dark: #1f2937;
  --text-muted: #6b7280;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: "Poppins", -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-dark);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-y: auto !important; /* Forces scrollability */
}

/* Bootstrap Override */
.btn-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-light) 100%
  );
  border: none;
  color: white;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}

.btn-primary:hover,
.btn-primary:focus {
  background: linear-gradient(
    135deg,
    var(--primary-dark) 0%,
    var(--primary-color) 100%
  );
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-accent {
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    var(--accent-light) 100%
  );
  border: none;
  color: var(--primary-color);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}

.btn-accent:hover,
.btn-accent:focus {
  background: linear-gradient(
    135deg,
    var(--accent-dark) 0%,
    var(--accent-color) 100%
  );
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
  border-radius: 14px;
}

/* Card Styles */
.card {
  border: none;
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all 0.3s ease;
  background: white;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-light) 100%
  );
  color: white;
}

.card-accent {
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    var(--accent-light) 100%
  );
  color: var(--primary-color);
}

.card-light {
  background: var(--light-color);
}
.container-fluid {
  padding-top: 60px; /* Adjust based on your AppBar height */
}
/* Stats Cards */
.stat-card {
  padding: 1.5rem;
  border-radius: 16px;
  background: white;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border-left: 4px solid var(--accent-color);
}

.stat-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.stat-icon-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-light) 100%
  );
  color: white;
}

.stat-icon-accent {
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    var(--accent-light) 100%
  );
  color: white;
}

.stat-icon-success {
  background: linear-gradient(135deg, #10b981 0%, #22c55e 100%);
  color: white;
}

.stat-icon-info {
  background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
  color: white;
}

/* Progress Bars */
.progress {
  height: 10px;
  border-radius: 10px;
  background-color: var(--light-color);
  overflow: hidden;
}

.progress-bar {
  background: linear-gradient(
    90deg,
    var(--primary-color) 0%,
    var(--accent-color) 100%
  );
  transition: width 0.6s ease;
}

.progress-bar-accent {
  background: linear-gradient(
    90deg,
    var(--accent-color) 0%,
    var(--accent-light) 100%
  );
}

/* Badges */
.badge {
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.875rem;
}

.badge-primary {
  background-color: var(--primary-color);
  color: white;
}

.badge-accent {
  background-color: var(--accent-color);
  color: var(--primary-color);
}

.badge-light {
  background-color: var(--light-color);
  color: var(--primary-color);
}

/* Navigation */
.navbar {
  background: white;
  box-shadow: var(--shadow);
  padding: 1rem 0;
}

.navbar-brand {
  font-weight: 700;
  color: var(--primary-color);
  font-size: 1.5rem;
}

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  transition: color 0.3s ease;
  padding: 0.5rem 1rem;
}

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

.nav-link.active {
  color: var(--primary-color);
  font-weight: 600;
}

/* Quiz Question Card */
.question-card {
  background: white;
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  min-height: 400px;
  display: flex;
  flex-direction: column;
}

.option-btn {
  width: 100%;
  text-align: left;
  padding: 1rem 1.5rem;
  margin-bottom: 0.75rem;
  border: 2px solid var(--border-color);
  background: white;
  border-radius: 12px;
  transition: all 0.3s ease;
  font-weight: 500;
  cursor: pointer;
}

.option-btn:hover {
  border-color: var(--primary-color);
  background-color: var(--light-color);
  transform: translateX(8px);
}

.option-btn.selected {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, var(--light-color) 0%, white 100%);
  box-shadow: var(--shadow);
}

.option-btn.correct {
  border-color: var(--success);
  background: linear-gradient(135deg, #d1fae5 0%, #ecfdf5 100%);
}

.option-btn.incorrect {
  border-color: var(--danger);
  background: linear-gradient(135deg, #fee2e2 0%, #fef2f2 100%);
}

/* Subject Cards */
.subject-card {
  background: white;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  text-decoration: none;
  display: block;
  border-left: 4px solid var(--primary-color);
}

.subject-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.subject-icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1rem;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

.slide-up {
  animation: slideUp 0.4s ease-out;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.pulse {
  animation: pulse 2s infinite;
}

/* Touch Feedback */
.btn,
.card,
.option-btn,
.subject-card {
  -webkit-tap-highlight-color: transparent;
}

.btn:active,
.option-btn:active {
  transform: scale(0.98);
}

/* Responsive Utilities */
@media (max-width: 768px) {
  body {
    padding-bottom: 80px;
  }

  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }
}

/* Challenge Arena */
.challenge-card {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-light) 100%
  );
  color: white;
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.challenge-card::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.1) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.match-key {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border: 2px dashed rgba(255, 255, 255, 0.5);
  border-radius: 12px;
  padding: 1rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-align: center;
  color: white;
}

/* Avatar */
.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-color);
}

.avatar-sm {
  width: 32px;
  height: 32px;
}

.avatar-lg {
  width: 80px;
  height: 80px;
}

/* Loading States */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Utility Classes */
.text-primary {
  color: var(--primary-color) !important;
}

.text-accent {
  color: var(--accent-color) !important;
}

.bg-primary {
  background-color: var(--primary-color) !important;
}

.bg-accent {
  background-color: var(--accent-color) !important;
}

.bg-light-custom {
  background-color: var(--light-color) !important;
}

.rounded-xl {
  border-radius: 16px !important;
}

.rounded-2xl {
  border-radius: 20px !important;
}

.shadow-sm-custom {
  box-shadow: var(--shadow-sm) !important;
}

.shadow-custom {
  box-shadow: var(--shadow) !important;
}

.shadow-lg-custom {
  box-shadow: var(--shadow-lg) !important;
}