:root {
  color-scheme: dark;
  --bg: #0b0b0c;
  --card: #17181a;
  --text: #f2f2f2;
  --muted: #a3a3a8;
  --accent: #ff5b5b;
  --accent-green: #4caf50;
  --border: #2a2b2e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Pretendard, Roboto, sans-serif;
  line-height: 1.6;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

header.hero {
  text-align: center;
  margin-bottom: 56px;
}

header.hero img {
  width: 112px;
  height: 112px;
  border-radius: 24px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

header.hero h1 {
  font-size: 2rem;
  font-weight: 800;
  margin: 20px 0 8px;
  letter-spacing: -0.02em;
}

header.hero p.tagline {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0;
}

nav.crumbs {
  text-align: center;
  margin-bottom: 32px;
  font-size: 0.9rem;
}

nav.crumbs a {
  color: var(--muted);
  text-decoration: none;
}

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

section {
  margin-bottom: 40px;
}

section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 24px;
}

ul.features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

ul.features li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

ul.features li .dot {
  color: var(--accent);
  font-size: 1.1rem;
  line-height: 1.4;
}

a.button {
  display: inline-block;
  background: var(--accent);
  color: white;
  text-decoration: none;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 999px;
}

a.button:hover {
  opacity: 0.9;
}

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

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 64px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.muted {
  color: var(--muted);
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #fafafa;
    --card: #ffffff;
    --text: #17181a;
    --muted: #6b6b70;
    --border: #e7e7e9;
  }
}