:root {
  --bg: #fbfbf9;
  --fg: #1c1d1f;
  --muted: #62656b;
  --line: #e2e2dd;
  --panel: #ffffff;
  --accent: #0f5e57;
  --accent-fg: #ffffff;
  --good-bg: #eaf5ef; --good-fg: #1d5e3a;
  --warn-bg: #fdf5e4; --warn-fg: #7a5212;
  --bad-bg: #fbecec;  --bad-fg: #8f2424;
  --code-bg: #f1f1ed;
  --radius: 8px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141517; --fg: #e8e8e6; --muted: #a0a3a8; --line: #2c2e32; --panel: #1b1c1f;
    --accent: #5fc2b5; --accent-fg: #0d1514;
    --good-bg: #16291f; --good-fg: #8fd6ad;
    --warn-bg: #2d2412; --warn-fg: #e9c47a;
    --bad-bg: #2f1919;  --bad-fg: #f0a3a3;
    --code-bg: #232428;
  }
}
:root[data-theme="dark"] {
  --bg: #141517; --fg: #e8e8e6; --muted: #a0a3a8; --line: #2c2e32; --panel: #1b1c1f;
  --accent: #5fc2b5; --accent-fg: #0d1514;
  --good-bg: #16291f; --good-fg: #8fd6ad;
  --warn-bg: #2d2412; --warn-fg: #e9c47a;
  --bad-bg: #2f1919;  --bad-fg: #f0a3a3;
  --code-bg: #232428;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); }
code, pre { font-family: var(--mono); font-size: 0.88em; }
code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; overflow-wrap: anywhere; }
pre { background: var(--code-bg); padding: 12px; border-radius: var(--radius); overflow-x: auto; white-space: pre; }
h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 1.3rem; margin: 0 0 10px; display: flex; align-items: center; gap: 10px; }
h3 { font-size: 1.05rem; margin: 22px 0 8px; }
section { padding: 28px 0; border-top: 1px solid var(--line); }
section.hero { border-top: 0; padding-top: 36px; }
.muted { color: var(--muted); font-size: 0.92em; }

.top { border-bottom: 1px solid var(--line); background: var(--panel); }
.top .wrap { padding-top: 12px; padding-bottom: 12px; }
.brand { color: var(--fg); text-decoration: none; font-weight: 600; letter-spacing: 0.01em; }

.promise { font-size: 1.1rem; max-width: 42em; }
.engine-status { font-size: 0.92em; color: var(--muted); }
.engine-status.ok::before { content: "● "; color: var(--good-fg); }
.engine-status.bad { color: var(--bad-fg); }

.step {
  display: inline-grid; place-items: center; width: 1.6em; height: 1.6em; border-radius: 50%;
  background: var(--accent); color: var(--accent-fg); font-size: 0.8em; flex: none;
}

.sample-files { display: grid; gap: 8px; margin: 12px 0; }
.sample-cases { padding-left: 20px; margin: 8px 0; }
details > summary { cursor: pointer; }
.sample-files pre { margin: 8px 0 0; max-height: 240px; }

.drops { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }
@media (max-width: 640px) { .drops { grid-template-columns: 1fr; } }
.drop {
  position: relative; display: flex; flex-direction: column; gap: 4px; padding: 22px 18px;
  border: 2px dashed var(--line); border-radius: var(--radius); background: var(--panel); cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drop:hover, .drop:focus-within, .drop:focus-visible { border-color: var(--accent); outline: none; }
.drop.over { border-color: var(--accent); background: var(--good-bg); }
.drop.has-file { border-style: solid; border-color: var(--accent); }
.drop input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }
.drop-title { font-weight: 600; }
.drop-hint { color: var(--muted); font-size: 0.9em; }
.drop-file { margin-top: 6px; font-family: var(--mono); font-size: 0.85em; overflow-wrap: anywhere; }

.columns-help p { margin: 6px 0; }

.settings {
  display: flex; flex-wrap: wrap; gap: 14px 20px; align-items: flex-end; margin-top: 18px;
  padding: 16px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
}
.settings > label { display: flex; flex-direction: column; gap: 4px; font-size: 0.92em; }
.settings label.check { flex-direction: row; align-items: center; gap: 6px; }
.settings .advanced { flex-basis: 100%; }
.settings .advanced label { display: flex; flex-direction: column; gap: 4px; margin-top: 10px; font-size: 0.92em; }
.settings .actions { flex-basis: 100%; display: flex; gap: 10px; flex-wrap: wrap; }
input[type="text"], input[type="number"], select {
  font: inherit; color: var(--fg); background: var(--bg); border: 1px solid var(--line);
  border-radius: 6px; padding: 6px 8px; min-width: 0;
}
input[type="number"] { width: 6em; }
input[type="text"], textarea { width: 100%; }
textarea { font: inherit; font-family: var(--mono); font-size: 0.88em; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; resize: vertical; }
select.missing { border-color: var(--bad-fg); }

button, .button {
  font: inherit; font-weight: 600; cursor: pointer; border-radius: 6px; padding: 8px 16px;
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-fg); text-decoration: none;
  display: inline-block;
}
button.secondary, .button.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button.link { background: none; border: 0; padding: 0; color: var(--accent); text-decoration: underline; font-weight: inherit; }
.size-note { margin-top: 10px; }

.result { margin-top: 14px; }
.stats { margin: 6px 0; }
.box { padding: 12px 16px; border-radius: var(--radius); margin: 12px 0; }
.box ul, ul.box { margin: 0; padding-left: 20px; }
ul.box { padding: 12px 16px 12px 32px; }
.box.good { background: var(--good-bg); color: var(--good-fg); }
.box.warn { background: var(--warn-bg); color: var(--warn-fg); }
.box.bad { background: var(--bad-bg); color: var(--bad-fg); }
.box p { margin: 0 0 6px; }
.issues { max-height: 320px; overflow-y: auto; }
.match { color: var(--good-fg); font-size: 0.92em; }
.match::before { content: "✓ "; }
.meanings { padding-left: 20px; margin: 4px 0 10px; font-size: 0.92em; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.chip {
  font-weight: 500; font-size: 0.85em; padding: 3px 10px; border-radius: 999px;
  background: transparent; color: var(--fg); border: 1px solid var(--line);
}
.chip[aria-pressed="true"] { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
table { border-collapse: collapse; width: 100%; font-size: 0.92em; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-weight: 600; color: var(--muted); background: var(--bg); }
tr:last-child td { border-bottom: 0; }
th.num, td.num { text-align: right; font-variant-numeric: tabular-nums; }
.downloads { margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap; }
.raw { margin-top: 14px; }
.raw pre { max-height: 360px; }

.mapping { margin: 6px 0 14px; }
.mapping-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 640px) { .mapping-grid { grid-template-columns: 1fr; } }
.mapping fieldset { border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px; margin: 0; background: var(--panel); }
.mapping legend { font-weight: 600; padding: 0 4px; }
.mapping label { display: grid; grid-template-columns: 6em 1fr; gap: 8px; align-items: center; margin: 5px 0; font-size: 0.92em; }

.build code { font-size: 0.8em; }
.build .bad { color: var(--bad-fg); }
.cta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.foot { padding-top: 20px; padding-bottom: 40px; color: var(--muted); font-size: 0.9em; border-top: 1px solid var(--line); }