:root {
  --background: #07111f;
  --surface: #0d1b2f;
  --surface-soft: #10223d;
  --border: rgba(151, 184, 224, 0.18);
  --text: #edf5ff;
  --muted: #9db1ca;
  --primary: #6d8cff;
  --primary-dark: #5073ff;
  --accent: #42e8b2;
  --danger: #ff7070;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 0%, rgba(80, 115, 255, 0.17), transparent 30rem),
    radial-gradient(circle at 85% 25%, rgba(66, 232, 178, 0.1), transparent 24rem),
    var(--background);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-header,
.hero,
.section,
.site-footer {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #06101e;
  background: linear-gradient(135deg, var(--accent), #7ed6ff);
  border-radius: 10px;
  box-shadow: 0 0 25px rgba(66, 232, 178, 0.28);
}

.navigation {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 0.92rem;
}

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

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 800;
  transition: transform 0.2s ease, background 0.2s ease, border 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #07111f;
  background: linear-gradient(135deg, var(--accent), #93f0d1);
}

.button-primary:hover {
  background: #8ff1d0;
}

.button-secondary,
.button-outline {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.button-secondary:hover,
.button-outline:hover {
  border-color: rgba(151, 184, 224, 0.42);
  background: rgba(255, 255, 255, 0.08);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 54px;
  align-items: center;
  min-height: 620px;
  padding: 66px 0 88px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.hero h1,
.section h2 {
  margin: 0;
  letter-spacing: -0.04em;
}

.hero h1 {
  max-width: 720px;
  font-size: clamp(2.5rem, 5.5vw, 4.8rem);
  line-height: 1.02;
}

.hero-description {
  max-width: 620px;
  margin: 24px 0 30px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

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

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 46px;
}

.hero-stats div {
  display: grid;
  gap: 5px;
}

.hero-stats strong {
  font-size: 1.3rem;
}

.hero-stats span {
  color: var(--muted);
  font-size: 0.86rem;
}

.hero-card,
.game-card,
.feature-card,
.steps article,
details {
  border: 1px solid var(--border);
  background: linear-gradient(150deg, rgba(18, 43, 73, 0.9), rgba(9, 22, 39, 0.88));
  box-shadow: var(--shadow);
}

.hero-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border-radius: var(--radius);
}

.hero-card > *:not(.glow) {
  position: relative;
  z-index: 1;
}

.glow {
  position: absolute;
  width: 180px;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(18px);
  opacity: 0.45;
}

.glow-one {
  top: -100px;
  right: -70px;
  background: var(--primary);
}

.glow-two {
  bottom: -110px;
  left: -80px;
  background: var(--accent);
}

.card-label {
  margin: 0 0 16px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.hero-card h2 {
  margin: 0;
  font-size: 1.7rem;
}

.hero-card > p:not(.card-label) {
  color: var(--muted);
  line-height: 1.65;
}

.track-form {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.track-form label {
  font-size: 0.85rem;
  font-weight: 800;
}

.track-form input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  color: var(--text);
  border: 1px solid var(--border);
  outline: none;
  background: rgba(5, 13, 25, 0.7);
  border-radius: 10px;
}

.track-form input:focus {
  border-color: var(--accent);
}

.track-form .button {
  margin-top: 4px;
}

.form-message {
  min-height: 20px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.section {
  padding: 80px 0;
}

.section-dark {
  width: 100%;
  max-width: none;
  padding: 80px max(20px, calc((100% - 1180px) / 2));
  background: rgba(2, 10, 20, 0.42);
  border-block: 1px solid var(--border);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-heading h2 {
  font-size: clamp(2rem, 3.6vw, 3rem);
}

.section-heading > a {
  color: var(--accent);
  font-weight: 800;
}

.centered {
  display: block;
  text-align: center;
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.game-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
  padding: 18px;
  border-radius: 15px;
}

.game-card h3,
.feature-card h3,
.steps h3 {
  margin: 0;
}

.game-card p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.game-card button {
  grid-column: 1 / -1;
  min-height: 38px;
  color: var(--accent);
  border: 1px solid rgba(66, 232, 178, 0.35);
  background: rgba(66, 232, 178, 0.08);
  border-radius: 9px;
  font-weight: 800;
}

.game-card button:hover {
  background: rgba(66, 232, 178, 0.16);
}

.game-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 13px;
  font-weight: 900;
}

.game-icon-blue {
  background: rgba(91, 133, 255, 0.25);
  color: #9cb4ff;
}

.game-icon-orange {
  background: rgba(255, 156, 74, 0.24);
  color: #ffc08a;
}

.game-icon-green {
  background: rgba(66, 232, 178, 0.2);
  color: #95f7d8;
}

.game-icon-red {
  background: rgba(255, 95, 116, 0.2);
  color: #ffabb6;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  padding: 26px;
  border-radius: 16px;
}

.feature-card span {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 1.8rem;
}

.feature-card p,
.steps p,
details p {
  color: var(--muted);
  line-height: 1.65;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.steps article {
  padding: 24px;
  border-radius: 16px;
}

.steps span {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  margin-bottom: 18px;
  color: var(--accent);
  border: 1px solid rgba(66, 232, 178, 0.35);
  border-radius: 50%;
  font-size: 0.82rem;
  font-weight: 900;
}

.faq-section {
  padding-bottom: 100px;
}

details {
  margin-bottom: 10px;
  padding: 18px 20px;
  border-radius: 12px;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

details p {
  margin: 16px 0 0;
}

.site-footer {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  padding: 34px 0 46px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.site-footer p {
  max-width: 440px;
  margin: 12px 0 0;
  font-size: 0.88rem;
  line-height: 1.65;
}

@media (max-width: 900px) {
  .navigation {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 34px;
    min-height: auto;
    padding-top: 42px;
  }

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

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

@media (max-width: 580px) {
  .site-header,
  .hero,
  .section,
  .site-footer {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    min-height: 70px;
  }

  .site-header .button-outline {
    display: none;
  }

  .hero h1 {
    font-size: 2.55rem;
  }

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

  .section-heading,
  .site-footer {
    display: block;
  }

  .section-heading > a {
    display: inline-block;
    margin-top: 14px;
  }

  .site-footer > p {
    margin-top: 26px;
  }

  .hero-card {
    padding: 22px;
  }
}