:root {
  --bg: #fbfaf8; --surface: #ffffff; --text: #1d1d1b; --muted: #66645f; --line: #e6e3dd;
  --accent: #0b6e4f; --accent-text: #ffffff; --accent-soft: #e3f1ec; --code-bg: #f3f1ed;
  --warn: #8a5a00; --warn-soft: #fbf0d9; --danger: #a8322a; --danger-soft: #f8e4e2;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141413; --surface: #1c1c1a; --text: #ecebe7; --muted: #a3a19b; --line: #2f2e2b;
    --accent: #5cc8a0; --accent-text: #0d1f18; --accent-soft: #19302a; --code-bg: #232321;
    --warn: #e8b85c; --warn-soft: #2e2615; --danger: #ef8a80; --danger-soft: #331c1a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141413; --surface: #1c1c1a; --text: #ecebe7; --muted: #a3a19b; --line: #2f2e2b;
  --accent: #5cc8a0; --accent-text: #0d1f18; --accent-soft: #19302a; --code-bg: #232321;
  --warn: #e8b85c; --warn-soft: #2e2615; --danger: #ef8a80; --danger-soft: #331c1a;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }
.topbar { border-bottom: 1px solid var(--line); background: var(--surface); }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.brand { font-weight: 700; text-decoration: none; color: var(--text); }
.brand span { color: var(--muted); font-weight: 500; }
.who { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--muted); flex-wrap: wrap; }
main.wrap { padding-top: 32px; padding-bottom: 80px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 40px 0 12px; }
h3 { font-size: 17px; margin: 0 0 4px; }
.lead { color: var(--muted); font-size: 18px; margin: 0 0 24px; max-width: 640px; }
button, .button {
  font: inherit; font-weight: 600; font-size: 15px; border-radius: 8px; padding: 8px 16px; cursor: pointer;
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-text); text-decoration: none; display: inline-block;
}
button.secondary { background: transparent; color: var(--accent); }
button.danger { background: transparent; color: var(--danger); border-color: var(--danger); }
button:disabled { opacity: .5; cursor: default; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin: 12px 0; }
.card p { margin: 6px 0; }
.row { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.pill { display: inline-block; font-size: 13px; font-weight: 600; padding: 2px 10px; border-radius: 999px; background: var(--code-bg); color: var(--muted); }
.pill.accent { background: var(--accent-soft); color: var(--accent); }
code, pre, .mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 14px; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; overflow-wrap: anywhere; }
pre { background: var(--code-bg); padding: 14px 16px; border-radius: 8px; overflow-x: auto; }
pre code { background: none; padding: 0; }
label { display: block; font-weight: 600; font-size: 14px; margin: 12px 0 4px; }
label.check { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; }
textarea, input[type="text"], select {
  font: inherit; width: 100%; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text);
}
textarea { min-height: 84px; resize: vertical; }
.meter { height: 8px; border-radius: 999px; background: var(--code-bg); overflow: hidden; margin: 8px 0 4px; }
.meter > div { height: 100%; background: var(--accent); }
.newkey { border-color: var(--accent); background: var(--accent-soft); }
.newkey code { display: block; padding: 10px; margin: 8px 0; font-size: 15px; background: var(--surface); }
.notice { padding: 12px 16px; border-radius: 8px; background: var(--warn-soft); color: var(--warn); margin: 12px 0; }
.error { color: var(--danger); font-size: 14px; min-height: 1em; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
td.usecase { max-width: 340px; white-space: pre-wrap; overflow-wrap: anywhere; }
.actions { display: flex; gap: 6px; flex-wrap: wrap; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 24px 0; }
.features .card { margin: 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 20px 0 40px; }
[hidden] { display: none !important; }
@media (max-width: 600px) { h1 { font-size: 28px; } }