:root {
  --bg: #061120;
  --bg-soft: #0b1c34;
  --surface: rgba(9, 24, 46, 0.84);
  --surface-strong: rgba(11, 28, 52, 0.95);
  --text: #e6edf7;
  --muted: #b1c0d5;
  --line: rgba(164, 184, 214, 0.26);
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.17);
  --radius: 16px;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.32);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 600px at 8% 0%, rgba(56, 189, 248, 0.2), transparent 58%),
    radial-gradient(850px 560px at 92% 12%, rgba(34, 197, 94, 0.12), transparent 56%),
    linear-gradient(180deg, #061120 0%, #081625 52%, #050d18 100%);
  min-height: 100vh;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 17, 32, 0.9);
  backdrop-filter: blur(10px);
}

.site-header-inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 14px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.brand {
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
}

.brand small {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
  margin-top: 3px;
}

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

.top-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 11px;
}

.top-links a:hover {
  color: var(--text);
  border-color: rgba(56, 189, 248, 0.44);
  background: rgba(56, 189, 248, 0.1);
}

.main-wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 30px 0 40px;
}

.hero {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 30px;
  background:
    linear-gradient(152deg, rgba(56, 189, 248, 0.15) 0%, rgba(11, 28, 52, 0.6) 42%, rgba(9, 24, 46, 0.93) 100%),
    var(--surface-strong);
  box-shadow: var(--shadow);
}

.kicker {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-size: 12px;
  color: #bde8ff;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(30px, 4.7vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.62;
  font-size: 17px;
  max-width: 940px;
}

.hero-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 11px;
  padding: 10px 16px;
  border: 1px solid rgba(56, 189, 248, 0.42);
  background: linear-gradient(180deg, #3ac3fb, #21a9df);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
}

.btn.secondary {
  background: rgba(9, 24, 46, 0.74);
  color: var(--text);
  border-color: var(--line);
}

.section {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 24px;
  box-shadow: var(--shadow);
}

.section h2 {
  margin: 0 0 10px;
  font-size: 28px;
  letter-spacing: -0.01em;
}

.section h3 {
  margin: 16px 0 8px;
  font-size: 21px;
}

.section p {
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.66;
}

.checklist {
  margin: 12px 0 0;
  padding-left: 20px;
}

.checklist li {
  margin-bottom: 8px;
  color: var(--muted);
  line-height: 1.55;
}

.answer-list {
  display: grid;
  gap: 12px;
}

.answer-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  background: rgba(8, 20, 37, 0.66);
}

.answer-item h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.answer-item p {
  margin: 0;
  font-size: 15px;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.link-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  text-decoration: none;
  color: var(--text);
  background: rgba(8, 20, 37, 0.66);
}

.link-card strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
}

.link-card span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.42;
}

.platform-note {
  border: 1px solid rgba(56, 189, 248, 0.34);
  border-radius: 12px;
  padding: 14px;
  background: var(--accent-soft);
}

.site-footer {
  margin-top: 20px;
  border-top: 1px solid var(--line);
  padding: 16px 0 26px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 800px) {
  .site-header-inner,
  .main-wrap { width: calc(100% - 24px); }

  .hero,
  .section { padding: 20px; }

  .hero-actions .btn {
    width: 100%;
  }
}