/* ============================================
   Red Education Platform - Common Styles
   ============================================ */

@import url('variables.css');
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600;700&family=Noto+Serif+SC:wght@400;600;700&display=swap');

/* Reset & Base */
*, *::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);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: #faf8f5;
  background-image:
    radial-gradient(ellipse at 10% 20%, rgba(185, 28, 28, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 90% 80%, rgba(245, 158, 11, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(185, 28, 28, 0.015) 0%, transparent 70%);
  background-attachment: fixed;
  overflow-x: hidden;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--section-padding-y) 0;
  position: relative;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  text-align: center;
  margin-bottom: var(--space-4);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin: var(--space-4) auto 0;
  border-radius: var(--radius-full);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-12);
  line-height: var(--leading-relaxed);
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--red-700), var(--red-600));
  color: var(--white);
  box-shadow: var(--shadow-red);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--red-600), var(--red-500));
  transform: translateY(-2px);
  box-shadow: 0 15px 35px -10px rgba(185, 28, 28, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: var(--white);
  box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px -10px rgba(245, 158, 11, 0.4);
}

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--gray-100);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--red-100);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--red-100), var(--red-50));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--primary);
  font-size: var(--text-2xl);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.card-text {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* Scroll Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* Decorative Elements */
.dot-pattern {
  background-image: radial-gradient(circle, var(--red-200) 1px, transparent 1px);
  background-size: 24px 24px;
}

.glow-red {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(220, 38, 38, 0.15) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.glow-gold {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
}

.badge-red {
  background: var(--red-50);
  color: var(--red-700);
}

.badge-gold {
  background: var(--gold-50);
  color: var(--gold-600);
}

/* Divider */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gray-200), transparent);
  margin: var(--space-12) 0;
}

/* Grid */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

/* Flex */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-title {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: var(--text-2xl);
  }

  .section-subtitle {
    font-size: var(--text-base);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .container {
    padding: 0 var(--space-4);
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================
   Footer (Shared across all pages) — index1 style
   ============================================ */
.footer {
  background: linear-gradient(135deg, #8B0000 0%, #C41E3A 50%, #8B0000 100%);
  color: white;
  padding: 3rem 3rem 1.5rem;
  margin-top: 3rem;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5rem;
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.footer-brand {
  grid-column: span 1;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.footer-logo img {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.footer-logo-text {
  font-size: 1.25rem;
  font-weight: 700;
}

.footer-description {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  font-size: 0.875rem;
  max-width: 260px;
  margin-bottom: 1.25rem;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.9);
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.3s ease;
}

.footer-social a:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-3px);
  color: white;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #FFFBF0;
  position: relative;
  display: inline-block;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 30px;
  height: 2px;
  background: rgba(255, 251, 240, 0.5);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-link {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.875rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  white-space: nowrap;
}

.footer-link:hover {
  color: white;
  transform: translateX(3px);
}

.footer-link i {
  font-size: 0.75rem;
  opacity: 0.7;
}

.footer-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
  margin-bottom: 1.5rem;
}

.footer-bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
  }
  .footer-brand {
    grid-column: span 1;
  }
  .footer-logo {
    justify-content: center;
  }
  .footer-title::after {
    left: 50%;
    transform: translateX(-50%);
  }
  .footer-links {
    align-items: center;
  }
  .footer-link {
    justify-content: center;
  }
}