:root {
  --bg: #0E0E0F;
  --surface: #18181A;
  --line: #2A2A2D;
  --text: #EDEDEF;
  --muted: #9A9AA0;
  --accent: #E8943A;
  --warn: #E5534B;
  --sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
  -webkit-text-size-adjust: 100%;
}

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

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font: 600 15px/1 var(--mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.hero-mark {
  display: block;
  margin: 0 0 24px;
}

header.site nav a {
  font: 13px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
}
header.site nav a:first-child { margin-left: 0; }
header.site nav a:hover, header.site nav a[aria-current="page"] { color: var(--accent); }

h1 {
  font-size: 32px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

h2 {
  font-size: 20px;
  margin: 40px 0 8px;
}

.label {
  font: 12px/1.4 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.lead { font-size: 19px; color: var(--text); }

p, li { color: #D4D4D8; }
strong { color: var(--text); }

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

ul, ol { padding-left: 22px; }
li { margin: 6px 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 24px 0;
}

.topics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  list-style: none;
  padding: 0;
}
.topics li {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
}
.topics strong { display: block; font-size: 15px; color: var(--text); }
.topics span { font-size: 14px; color: var(--muted); line-height: 1.45; }

/* Help topics: each card is a button that opens the article dialog. */
.topic-group { margin: 28px 0 10px; }
.topics li:has(> button) { padding: 0; }
.topics button {
  all: unset;
  box-sizing: border-box;
  display: block;
  width: 100%;
  height: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  cursor: pointer;
}
.topics li:has(> button):hover { border-color: var(--accent); }
.topics button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

dialog {
  width: min(640px, calc(100vw - 32px));
  max-height: calc(100dvh - 48px);
  padding: 0 20px 24px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow-y: auto;
  overscroll-behavior: contain;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.7); }
body:has(dialog[open]) { overflow: hidden; }

.dialog-head {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0 10px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.dialog-head .label { margin: 0; }
.dialog-close {
  width: 44px;
  height: 44px;
  margin-right: -12px;
  border: 0;
  background: none;
  color: var(--muted);
  font: 28px/1 var(--sans);
  cursor: pointer;
}
.dialog-close:hover, .dialog-close:focus-visible { color: var(--accent); }

#help-article h2 { margin: 20px 0 6px; font-size: 24px; }
#help-article h3 { margin: 24px 0 4px; font-size: 17px; }
#help-article .lead { font-size: 17px; color: var(--muted); }

.note {
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: rgba(232, 148, 58, 0.08);
  border-radius: 0 8px 8px 0;
}
.note-warning {
  border-left-color: var(--warn);
  background: rgba(229, 83, 75, 0.08);
}

.related {
  margin-top: 28px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.related .label { margin: 0 0 4px; }

footer {
  margin-top: 56px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font: 12px/1.6 var(--mono);
  color: var(--muted);
}

#help-article:focus { outline: none; }