:root {
  --bg: #0f1020;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.12);
  --text: #f8fafc;
  --muted: #cbd5e1;
  --subtle: #94a3b8;
  --accent: #8b5cf6;
  --accent-2: #22c55e;
  --accent-3: #facc15;
  --line: rgba(255, 255, 255, 0.14);
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(139, 92, 246, 0.35), transparent 30rem),
    radial-gradient(circle at top right, rgba(34, 197, 94, 0.22), transparent 26rem),
    linear-gradient(180deg, #0f1020 0%, #15162b 48%, #0f1020 100%);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(15, 16, 32, 0.72);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 850;
  letter-spacing: -0.03em;
  font-size: 1.15rem;
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(250, 204, 21, 0.95), rgba(139, 92, 246, 0.95));
  box-shadow: 0 18px 40px rgba(139, 92, 246, 0.24);
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 0.95rem;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  color: white;
  font-weight: 750;
  box-shadow: 0 16px 42px rgba(99, 102, 241, 0.25);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  box-shadow: none;
  color: var(--text);
}

.hero {
  padding: 88px 0 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 52px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 20px;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.12);
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 5.9rem);
  line-height: 0.94;
  letter-spacing: -0.075em;
}

.hero-copy {
  color: var(--muted);
  margin: 24px 0 0;
  font-size: clamp(1.08rem, 2vw, 1.32rem);
  line-height: 1.65;
  max-width: 660px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 42px;
}

.stat {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
}

.stat strong {
  display: block;
  font-size: 1.45rem;
  letter-spacing: -0.04em;
}

.stat span {
  display: block;
  margin-top: 4px;
  color: var(--subtle);
  font-size: 0.88rem;
  line-height: 1.3;
}

.phone-card {
  position: relative;
  max-width: 420px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 44px;
  padding: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.05));
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.28);
}

.phone-screen {
  border-radius: 32px;
  min-height: 580px;
  padding: 24px;
  background:
    radial-gradient(circle at 25% 15%, rgba(250, 204, 21, 0.28), transparent 12rem),
    radial-gradient(circle at 80% 25%, rgba(139, 92, 246, 0.32), transparent 14rem),
    linear-gradient(180deg, #171830 0%, #10111f 100%);
  overflow: hidden;
}

.message-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--subtle);
  font-size: 0.86rem;
  margin-bottom: 20px;
}

.challenge-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.08);
}

.challenge-label {
  color: var(--subtle);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.challenge-question {
  font-size: 1.5rem;
  font-weight: 850;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.emoji-row {
  display: flex;
  gap: 10px;
  margin: 24px 0;
  flex-wrap: wrap;
}

.emoji-chip {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 1.65rem;
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid var(--line);
}

.answer-bar {
  height: 48px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.08);
  color: var(--subtle);
  display: flex;
  align-items: center;
  padding: 0 16px;
}

.leaderboard {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--muted);
  font-size: 0.92rem;
}

.section {
  padding: 76px 0;
}

.section-header {
  max-width: 740px;
  margin-bottom: 30px;
}

.kicker {
  color: var(--accent-3);
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-size: 0.78rem;
  font-weight: 850;
  margin-bottom: 12px;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.section-header p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.65;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  padding: 28px;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 17px;
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid var(--line);
  margin-bottom: 18px;
}

.card h3 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.card p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.62;
}

.about-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 36px;
  border-radius: 34px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
}

.about-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 1.05rem;
}

.contact-box {
  padding: 36px;
  border-radius: 34px;
  background:
    linear-gradient(135deg, rgba(139, 92, 246, 0.22), rgba(34, 197, 94, 0.12)),
    rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.contact-box p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 32px 0;
  color: var(--subtle);
  font-size: 0.92rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.legal-page {
  padding: 64px 0;
}

.legal-panel {
  max-width: 860px;
  padding: 38px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
}

.legal-panel h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
}

.legal-panel h2 {
  margin-top: 32px;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.legal-panel p, .legal-panel li {
  color: var(--muted);
  line-height: 1.72;
}

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

  .phone-card {
    margin: 20px auto 0;
  }

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

  .quick-stats {
    grid-template-columns: 1fr;
  }

  .contact-box {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    display: none;
  }

  .phone-screen {
    min-height: 520px;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(var(--max), calc(100% - 28px));
  }

  .hero {
    padding-top: 56px;
  }

  .phone-card {
    border-radius: 34px;
    padding: 12px;
  }

  .phone-screen {
    border-radius: 26px;
    padding: 18px;
  }

  .card,
  .about-panel,
  .contact-box,
  .legal-panel {
    padding: 24px;
  }
}