/* Listen-A|B support site — shared stylesheet (no build step, no JS) */

:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6e6e73;
  --border: #d9d9de;
  --accent: #6f42c1;      /* app Pro badge purple, used sparingly */
  --accent-fg: #ffffff;
  --table-head: #f5f3fa;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --fg: #f2f2f7;
    --muted: #98989f;
    --border: #3a3a3e;
    --accent: #b197fc;
    --accent-fg: #241b38;
    --table-head: #29242f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Hiragino Sans", "Noto Sans CJK JP", "Apple SD Gothic Neo", "PingFang SC",
    sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

header.site, main, footer.site {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

header.site {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: 0.01em;
}

nav.lang {
  font-size: 0.85rem;
  color: var(--muted);
}

nav.lang a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 0.65rem;
}

nav.lang a:first-child { margin-left: 0; }

nav.lang a:hover { color: var(--accent); }

nav.lang a[aria-current="true"] {
  color: var(--accent);
  font-weight: 600;
}

main { padding-bottom: 2rem; }

h1 {
  font-size: 1.9rem;
  line-height: 1.25;
  margin: 1.2rem 0 0.3rem;
  letter-spacing: -0.01em;
}

.tagline {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.6rem;
}

h2 {
  font-size: 1.25rem;
  margin: 2.2rem 0 0.7rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1rem;
  margin: 1.4rem 0 0.25rem;
}

p { margin: 0.4rem 0 0.9rem; }

ul { padding-left: 1.3rem; margin: 0.4rem 0 1rem; }
li { margin: 0.35rem 0; }

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

strong { font-weight: 600; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 0.8rem 0 1rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.7rem;
  text-align: left;
  vertical-align: top;
}

thead th { background: var(--table-head); }

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

.badge {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 4px;
  padding: 0.08rem 0.42rem;
  vertical-align: 0.1em;
}

.note { color: var(--muted); font-size: 0.9rem; }

footer.site {
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  padding-bottom: 2.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

footer.site p { margin: 0.3rem 0 0.8rem; }

.trademark {
  font-size: 0.75rem;
  line-height: 1.55;
}

kbd {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.85em;
  background: var(--table-head);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}