:root {
  color-scheme: light dark;
  --bg: #fafaff;
  --surface: #ffffff;
  --fg: #1a1a2e;
  --muted: #5c5c72;
  --blue: #1a73e8;
  --purple: #7c3aed;
  --purple-deep: #3f1070;
  --cyan: #00e6ff;
  --border: rgba(63, 16, 112, 0.12);
  --gradient: linear-gradient(135deg, var(--blue), var(--purple) 55%, var(--purple-deep));
  --max-width: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #100b1e;
    --surface: #17122a;
    --fg: #f1f0fa;
    --muted: #ada9c4;
    --border: rgba(0, 230, 255, 0.16);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
}

header {
  padding: 2.5rem 1.5rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.85rem;
}

.brand img {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

.wordmark {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin: 0;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

main {
  padding: 0 1.5rem 3rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

h1 {
  color: var(--purple-deep);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 1.5rem 0 0.25rem;
}

@media (prefers-color-scheme: dark) {
  h1 {
    color: #d6b8ff;
  }
}

h2 {
  color: var(--purple-deep);
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 2.25rem;
}

@media (prefers-color-scheme: dark) {
  h2 {
    color: #d6b8ff;
  }
}

nav {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--purple);
  border-image: var(--gradient) 1;
  border-bottom: 2px solid;
}

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

.tagline {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0.35rem 0 0;
}

.updated {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0.35rem 0 0;
}

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}