:root {
  --bg: #f6f8f8;
  --surface: #ffffff;
  --text: #1b1b1b;
  --muted: #5d6766;
  --border: #dde4e3;
  --brand: #0b7a75;
  --brand-soft: #e3f2f1;
  --warn-soft: #fff4e0;
  --warn-border: #f0c47a;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1514;
    --surface: #182120;
    --text: #e6eceb;
    --muted: #9aa8a6;
    --border: #2a3735;
    --brand: #4fc3bc;
    --brand-soft: #1c3331;
    --warn-soft: #2f2615;
    --warn-border: #7a5a24;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

a { color: var(--brand); }
a:hover { text-decoration: none; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.site-header .wrap { display: flex; align-items: center; gap: 12px; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; min-width: 0; }
.brand img { width: 40px; height: 40px; border-radius: 10px; flex: none; }
.brand strong { display: block; font-size: 1.05em; line-height: 1.2; }
.brand span { display: block; color: var(--muted); font-size: 0.85em; line-height: 1.2; }
.header-link { margin-left: auto; font-size: 0.9em; white-space: nowrap; }

/* Content */
main { padding: 24px 0 40px; }
h1 { font-size: 1.7em; line-height: 1.25; margin: 0.2em 0 0.4em; }
h2 { font-size: 1.25em; margin: 1.8em 0 0.5em; }
h3 { font-size: 1.05em; margin: 1.4em 0 0.4em; }
p, ul, ol { margin: 0 0 1em; }
li { margin: 0.3em 0; }
.lead { color: var(--muted); font-size: 1.05em; }
.path { font-weight: 600; }
kbd, .ui {
  font-family: inherit;
  font-weight: 600;
  background: var(--brand-soft);
  border-radius: 6px;
  padding: 0 0.35em;
  white-space: nowrap;
}

.breadcrumb { font-size: 0.9em; color: var(--muted); margin-bottom: 8px; }
.breadcrumb a { color: var(--muted); }

.note, .tip {
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 1.2em 0;
  border: 1px solid var(--border);
  background: var(--surface);
}
.tip { background: var(--brand-soft); border-color: transparent; }
.note { background: var(--warn-soft); border-color: var(--warn-border); }
.note > :last-child, .tip > :last-child { margin-bottom: 0; }

/* Article cards on the index */
.cards { list-style: none; padding: 0; margin: 0 0 1em; display: grid; gap: 10px; }
.cards li { margin: 0; }
.cards a {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--text);
  text-decoration: none;
}
.cards a:hover { border-color: var(--brand); }
.cards strong { display: block; color: var(--brand); }
.cards span { display: block; color: var(--muted); font-size: 0.92em; }

.callout {
  display: block;
  background: var(--brand);
  color: #fff;
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  margin: 1em 0 0.5em;
}
.callout strong { display: block; font-size: 1.1em; }
@media (prefers-color-scheme: dark) { .callout { color: #0f1514; } }

/* Brand jump list */
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; }
.chips li { margin: 0; }
.chips a {
  display: inline-block;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 999px;
  padding: 4px 12px;
  text-decoration: none;
  font-size: 0.92em;
}

section.brand-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 18px 8px;
  margin: 14px 0;
}
section.brand-section h2 { margin-top: 0.8em; }

/* FAQ */
details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 8px 0;
}
details summary { cursor: pointer; font-weight: 600; }
details[open] summary { margin-bottom: 8px; }
details > :last-child { margin-bottom: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9em; padding: 20px 0 32px; }
.site-footer a { color: var(--muted); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 8px; }