/* ============================================
   KURIKULUM SMKN 2 KOTA SERANG - Design System
   Mobile-First Modern Landing Page
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Colors */
  --primary: #1e3a5f;
  --primary-dark: #152a45;
  --primary-light: #2a4f7a;
  --accent: #d4a439;
  --accent-light: #e6be5a;
  --accent-dark: #b8902f;
  --white: #ffffff;
  --light-gray: #f5f7fa;
  --gray: #6b7280;
  --dark-gray: #374151;
  --text-dark: #1f2937;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  --gradient-hero: linear-gradient(135deg, rgba(30, 58, 95, 0.95) 0%, rgba(21, 42, 69, 0.9) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 40px rgba(212, 164, 57, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

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

/* ---------- Utilities ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

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

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md);
  background: transparent;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(30, 58, 95, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.navbar-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  object-fit: contain;
}

.navbar-title {
  color: var(--white);
  font-size: var(--font-size-lg);
  font-weight: 600;
  display: none;
}

.navbar-menu {
  display: none;
  gap: var(--spacing-lg);
}

.navbar-link {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.navbar-link:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-sm);
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background: var(--gradient-primary);
  padding: var(--spacing-3xl) var(--spacing-xl);
  transition: right var(--transition-base);
  z-index: 1001;
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  color: var(--white);
  font-size: var(--font-size-2xl);
  padding: var(--spacing-sm);
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.mobile-menu-link {
  color: var(--white);
  font-size: var(--font-size-lg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-menu-link:hover {
  background: rgba(255, 255, 255, 0.1);
}

.mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 1000;
}

.mobile-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: url('hero-bg.jpg') center center / cover no-repeat;
  padding: var(--spacing-3xl) var(--spacing-md);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(30, 58, 95, 0.92) 0%, rgba(21, 42, 69, 0.88) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(212, 164, 57, 0.15);
  border: 1px solid rgba(212, 164, 57, 0.3);
  color: var(--accent-light);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  animation: fadeInDown 0.8s ease;
}

.hero-badge-icon {
  font-size: var(--font-size-base);
}

.hero-badge-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.hero-title {
  color: var(--white);
  font-size: var(--font-size-3xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-title-accent {
  color: var(--accent);
  display: block;
}

.hero-subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-scroll {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.6);
  animation: bounce 2s infinite;
}

.hero-scroll-icon {
  font-size: var(--font-size-2xl);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--primary-dark);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-icon {
  font-size: var(--font-size-lg);
}

/* ---------- Features Section ---------- */
.features {
  padding: var(--spacing-3xl) var(--spacing-md);
  background: var(--light-gray);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
}

.section-badge {
  display: inline-block;
  background: rgba(30, 58, 95, 0.1);
  color: var(--primary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: var(--font-size-2xl);
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

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

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(30, 58, 95, 0.08);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: var(--font-size-xl);
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--gray);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--accent-dark);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: gap var(--transition-fast);
}

.feature-link:hover {
  gap: var(--spacing-md);
  color: var(--primary);
}

/* ---------- About Section ---------- */
.about {
  padding: var(--spacing-3xl) var(--spacing-md);
  background: var(--white);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

.about-text {
  order: 2;
}

.about-visual {
  order: 1;
}

.about-visual-card {
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.about-visual-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(212, 164, 57, 0.2) 0%, transparent 70%);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.about-stat {
  text-align: center;
  padding: var(--spacing-md);
}

.about-stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--accent);
}

.about-stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.8);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--spacing-2xl) var(--spacing-md);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.footer-logo-img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.footer-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.footer-link {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-sm);
  padding: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent);
}

.footer-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin-bottom: var(--spacing-lg);
}

.footer-info {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.footer-copyright {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  40% {
    transform: translateX(-50%) translateY(-10px);
  }

  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

/* ---------- Media Queries ---------- */
/* Tablet */
@media (min-width: 640px) {
  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .navbar-title {
    display: block;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .navbar-menu {
    display: flex;
  }

  .mobile-menu-btn {
    display: none;
  }

  .hero-title {
    font-size: var(--font-size-5xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-xl);
  }

  .about-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .about-text {
    order: 1;
  }

  .about-visual {
    order: 2;
  }
}