:root {
  --apple-blue: #0a84ff;
  --apple-teal: #64d2ff;
  --apple-green: #34c759;
  --apple-yellow: #ffd60a;
  --apple-orange: #ff9f0a;
  --apple-red: #ff3b30;
  --ink: #0b1220;
  --slate: #5a6474;
  --mist: #f5f7fb;
  --card: #ffffff;
  --line: rgba(11, 18, 32, 0.08);
  --shadow: 0 18px 40px rgba(10, 20, 40, 0.14);
  --accent: #0a84ff;
  --accent-soft: rgba(10, 132, 255, 0.12);
  --accent-border: rgba(10, 132, 255, 0.24);
  --accent-glow: rgba(10, 132, 255, 0.28);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top, #ffffff 0%, #e8eef9 52%, #dfe7f5 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 12% 20%, var(--accent-soft), transparent 45%),
    radial-gradient(circle at 85% 30%, rgba(52, 199, 89, 0.14), transparent 40%),
    radial-gradient(circle at 30% 80%, rgba(255, 159, 10, 0.12), transparent 45%);
  pointer-events: none;
  z-index: -1;
}

body.theme-court {
  --accent: #7c9cc1;
  --accent-soft: rgba(124, 156, 193, 0.18);
  --accent-border: rgba(124, 156, 193, 0.3);
  --accent-glow: rgba(124, 156, 193, 0.3);
  background: radial-gradient(circle at top, #ffffff 0%, #eef1f6 52%, #e2e7f0 100%);
}

body.theme-dandy {
  --accent: #b38a7c;
  --accent-soft: rgba(179, 138, 124, 0.18);
  --accent-border: rgba(179, 138, 124, 0.3);
  --accent-glow: rgba(179, 138, 124, 0.3);
  background: radial-gradient(circle at top, #ffffff 0%, #f3ece8 52%, #e8dfd8 100%);
}

body.theme-demon {
  --accent: #7b6f88;
  --accent-soft: rgba(123, 111, 136, 0.2);
  --accent-border: rgba(123, 111, 136, 0.3);
  --accent-glow: rgba(123, 111, 136, 0.3);
  background: radial-gradient(circle at top, #ffffff 0%, #f0ecf3 52%, #e3dde9 100%);
}

nav.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 6vw 0;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--accent);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-link {
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--accent-border);
  color: var(--slate);
  font-weight: 600;
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.7);
}

.nav-link.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

main {
  display: flex;
  flex-direction: column;
  gap: 48px;
  padding: 0 6vw 72px;
}

h1,
h2,
h3 {
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

h3 {
  font-size: 1.15rem;
}

p {
  margin: 0 0 12px;
  color: var(--slate);
  line-height: 1.65;
}

ul {
  margin: 0;
  padding-left: 18px;
  color: var(--slate);
  line-height: 1.7;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 32px;
  padding: 64px 6vw 40px;
  align-items: center;
}

.hero-content {
  max-width: 640px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 700;
}

.tagline {
  font-size: 1.15rem;
  color: var(--ink);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 12px 24px var(--accent-glow);
}

.button.ghost {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-soft);
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px var(--accent-glow);
}

.hero-card {
  background: var(--card);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 18px;
  border: 1px solid var(--line);
}

.stat {
  display: grid;
  gap: 6px;
}

.stat-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--slate);
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
}

.section {
  background: var(--card);
  border-radius: 28px;
  padding: 36px;
  border: 1px solid var(--line);
  box-shadow: 0 16px 40px rgba(15, 25, 50, 0.08);
}

.section-header {
  max-width: 640px;
  margin-bottom: 24px;
}

.play-section .note {
  margin-top: 16px;
  font-size: 0.95rem;
}

.iframe-shell {
  background: #f5f6f9;
  border-radius: 20px;
  padding: 16px;
  border: 1px solid var(--accent-border);
  aspect-ratio: 552 / 167;
  width: 100%;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.iframe-shell iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.info-card {
  background: linear-gradient(135deg, var(--accent-soft), rgba(100, 210, 255, 0.14));
  padding: 24px;
  border-radius: 20px;
  border: 1px solid var(--accent-border);
}

.highlight {
  background: linear-gradient(135deg, rgba(255, 214, 10, 0.12), rgba(255, 159, 10, 0.12));
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.game-card {
  display: block;
  padding: 20px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.game-card h3 {
  margin: 0 0 10px;
  color: var(--ink);
}

.game-card p {
  margin: 0;
}

.game-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px var(--accent-glow);
}

.step {
  background: rgba(255, 255, 255, 0.8);
  border-radius: 18px;
  padding: 18px;
  border: 1px solid rgba(11, 18, 32, 0.08);
}

.footer {
  padding: 24px 6vw 40px;
  text-align: center;
  color: var(--slate);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  nav.top-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

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

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

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

  .hero-card {
    order: -1;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 48px 6vw 24px;
  }

  .section {
    padding: 28px 22px;
  }

  .iframe-shell {
    padding: 12px;
    aspect-ratio: 16 / 9;
    min-height: 60vh;
  }
}