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

:root {
  color-scheme: dark;
  --bg: #0f1117;
  --panel: #151923;
  --panel-soft: #1b2130;
  --text: #e9edf7;
  --muted: #a6b0c3;
  --accent: #7c5cff;
  --accent-2: #40d9ff;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 16px 40px rgba(8, 12, 20, 0.45);
}

body {
  margin: 0;
  font-family: "Segoe UI", "Inter", system-ui, -apple-system, sans-serif;
  background: radial-gradient(1200px 600px at 30% -10%, #1f2141, transparent)
      no-repeat,
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

a:hover,
a:focus-visible {
  color: var(--accent-2);
}

.container {
  width: min(1040px, 92vw);
  margin: 0 auto;
}

.hero {
  padding: 48px 0 32px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.2), transparent 60%);
  border-bottom: 1px solid var(--border);
}

.hero__badge {
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.2);
  color: var(--accent-2);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(28px, 5vw, 44px);
  margin: 0 0 16px;
}

.hero__lead {
  color: var(--muted);
  margin: 0 0 24px;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.btn {
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 12px 18px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s ease;
}

.btn--primary {
  background: linear-gradient(130deg, var(--accent), var(--accent-2));
  color: #0b0d14;
  box-shadow: var(--shadow);
}

.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn:active {
  transform: translateY(1px);
}

.hero__note {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 12px;
  color: var(--muted);
  font-size: 14px;
}

main {
  padding: 32px 0 56px;
  display: grid;
  gap: 20px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px 20px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: clamp(20px, 3.5vw, 28px);
}

ul,
ol {
  padding-left: 20px;
  margin: 12px 0;
}

.columns {
  columns: 2;
  column-gap: 24px;
}

.columns li {
  break-inside: avoid;
}

.footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--border);
  background: #0b0e16;
  color: var(--muted);
  font-size: 14px;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 720px) {
  .columns {
    columns: 1;
  }

  .hero {
    padding-top: 36px;
  }

  .card {
    padding: 20px 16px;
  }
}