:root {
  --bg: #10132A;
  --bg-deep: #0B0E22;
  --surface: #171B38;
  --border: #262A4A;
  --text: #EEF0FA;
  --muted: #A9AECB;
  --gold: #F2D58A;
  --danger: #FF9B8F;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: radial-gradient(120% 60% at 50% 0%, var(--bg) 0%, var(--bg-deep) 100%) fixed, var(--bg-deep);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

nav.top {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 15px;
  margin-bottom: 32px;
}

nav.top a.home { color: var(--text); font-weight: 600; margin-right: auto; }

a { color: var(--gold); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }

h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.01em; }
h2 { font-size: 20px; line-height: 1.3; margin: 36px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }

p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
li { margin-bottom: 4px; }

.updated { color: var(--muted); font-size: 15px; margin-bottom: 28px; }
.muted { color: var(--muted); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 20px;
  margin: 20px 0;
}
.card > :last-child { margin-bottom: 0; }

.card.help { border-color: rgba(255, 155, 143, 0.45); }
.card.help strong { color: var(--danger); }

.todo {
  background: rgba(255, 155, 143, 0.15);
  color: var(--danger);
  border-radius: 6px;
  padding: 0 6px;
  font-weight: 600;
}

details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 20px;
  margin: 10px 0;
}
details summary { cursor: pointer; font-weight: 600; }
details[open] summary { margin-bottom: 8px; }
details > :last-child { margin-bottom: 0; }

footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding-top: 20px;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}
footer a { color: var(--muted); }