/* ===== Theme Variables ===== */
:root {
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 6px;
  --transition: 0.2s ease;
}

[data-theme='light'] {
  --bg-primary: #fdf9ee;
  --bg-secondary: #f5f0e3;
  --bg-card: #ffffff;
  --text-primary: #323239;
  --text-secondary: #5e5e6e;
  --accent: #2f71b4;
  --accent-hover: #245a91;
  --accent-light: #e8f0fa;
  --border: #e0dcd0;
  --nav-bg: #fdf9ee;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
}

[data-theme='dark'] {
  --bg-primary: #1c1c20;
  --bg-secondary: #25252b;
  --bg-card: #2a2a32;
  --text-primary: #c8c8cf;
  --text-secondary: #9e9eab;
  --accent: #81aff9;
  --accent-hover: #a3c5ff;
  --accent-light: #2a3040;
  --border: #3a3a44;
  --nav-bg: #1c1c20;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
}

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

a:hover {
  color: var(--accent-hover);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: background var(--transition);
}

.nav-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--accent);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1rem;
  transition: border-color var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ===== Hero ===== */
.hero {
  padding: 120px 0 60px;
}

.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.hero-content {
  flex: 1;
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-illustration {
  flex-shrink: 0;
}

.emoji-art {
  font-size: 6rem;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn-secondary {
  background: var(--accent-light);
  color: var(--accent);
}

.btn-secondary:hover {
  background: var(--accent);
  color: #fff;
}

/* ===== Sections ===== */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 32px;
}

/* ===== About Card ===== */
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.about-card p {
  margin-bottom: 16px;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.about-card p:last-child {
  margin-bottom: 0;
}

.about-card strong {
  color: var(--text-primary);
}

/* ===== Card Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.card-icon {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ===== Quick Facts ===== */
.facts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.fact {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
}

.fact-label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.fact-value {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
}

.footer p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
  }

  .nav-links.active {
    display: flex;
  }

  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

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

  .card-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 480px) {
  .facts-grid {
    grid-template-columns: 1fr;
  }
}