:root { --bg: #f5f7fb; --fg: #18212f; --muted: #4e5a6c; --line: #c9d1de; --panel: #fff; --accent: #1a5697; --on-accent: #fff; --error: #a4302a; --notice: #fdf4dc; }
@media (prefers-color-scheme: dark) { :root { --bg: #111720; --fg: #e8edf4; --muted: #a9b5c4; --line: #36424f; --panel: #1a222e; --accent: #8abcf1; --on-accent: #0c1420; --error: #f4a29c; --notice: #33290f; color-scheme: dark; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.55 "Segoe UI", system-ui, -apple-system, sans-serif; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--panel); padding: 8px 12px; z-index: 2; }
.top, main, footer { max-width: 860px; margin: 0 auto; padding-inline: 16px; }
.top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding-block: 18px; }
.top nav { margin-left: auto; }
.small-button { padding: 7px 14px; }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 16px; }
main, .stack { display: grid; gap: 32px; }
main { padding-block: 16px 48px; }
main > *, .stack > * { min-width: 0; }
footer { color: var(--muted); font-size: .88rem; padding-block: 16px 32px; }
h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); line-height: 1.15; margin: 0 0 12px; text-wrap: balance; }
h2 { font-size: 1.3rem; margin: 0 0 10px; }
h3 { font-size: 1.05rem; margin: 16px 0 6px; }
p { margin: 0 0 10px; }
ul { margin: 0; padding-left: 22px; display: grid; gap: 6px; }
a { color: var(--accent); }
.small { color: var(--muted); font-size: .92rem; }
.notice { background: var(--notice); border: 1px solid var(--line); border-radius: 6px; padding: 10px 14px; }
.error { color: var(--error); font-weight: 600; }
.error:empty, .result:empty { display: none; }
.result { font-weight: 600; }
.button, button { display: inline-block; font-size: 1rem; font-weight: 600; line-height: 1.3; font-family: inherit; color: var(--on-accent); background: var(--accent); border: 1px solid var(--accent); border-radius: 6px; padding: 9px 16px; cursor: pointer; text-decoration: none; min-height: 40px; }
button.quiet { background: transparent; color: var(--accent); }
button.danger { background: transparent; color: var(--error); border-color: var(--error); }
button:disabled { opacity: .6; cursor: progress; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
label { display: block; font-weight: 600; margin: 8px 0 4px; }
input:not([type=file]), textarea, select { width: 100%; font: inherit; color: inherit; background: var(--panel); border: 1px solid var(--muted); border-radius: 6px; padding: 8px 10px; min-height: 40px; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 10px; }
.row input, .row select { flex: 1 1 180px; width: auto; }
.row label { margin: 0; }
.scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); margin-top: 10px; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
th { color: var(--muted); font-size: .85rem; font-weight: 600; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
pre { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 12px; overflow-x: auto; font-size: .88rem; margin: 0 0 10px; white-space: pre-wrap; overflow-wrap: anywhere; }
code { font-size: .9em; }
[hidden] { display: none !important; }