:root {
  color-scheme: dark;
  --bg: #07090d;
  --panel: #17191f;
  --panel-strong: #20232b;
  --text: #f8fafc;
  --muted: #a7adba;
  --line: rgba(255, 255, 255, 0.13);
  --accent: #ff7a22;
  --accent-2: #27d0c3;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #07090d 0%, #101219 100%);
  color: var(--text);
  line-height: 1.6;
}

main {
  width: min(880px, calc(100% - 40px));
  margin: 0 auto;
  padding: 56px 0;
}

header {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #ff4d18);
  display: inline-grid;
  place-items: center;
  color: white;
  font-size: 0.82rem;
}

h1 {
  margin: 18px 0 12px;
  font-size: clamp(2.2rem, 7vw, 4rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 10px;
  font-size: 1.35rem;
  letter-spacing: 0;
}

h3 {
  margin: 22px 0 6px;
  font-size: 1rem;
  letter-spacing: 0;
}

p, li { color: var(--muted); }

a { color: var(--accent-2); }

section {
  margin-top: 22px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.tile {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
}

footer {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}