:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1d2430;
  --muted: #5b6675;
  --line: #e3e7ee;
  --accent: #2653d4;
  --accent-ink: #ffffff;
  --high: #c62828;
  --high-bg: #fdecea;
  --medium: #b26a00;
  --medium-bg: #fff4e0;
  --low: #4a5763;
  --low-bg: #eef1f5;
  --ok: #1b7a3d;
  --ok-bg: #e7f5ec;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d; --card: #1b2130; --ink: #e7ebf2; --muted: #9aa5b4;
    --line: #2b3345; --accent: #6a8dff; --accent-ink: #0e1320;
    --high: #ff8a80; --high-bg: #3a2020; --medium: #ffcc80; --medium-bg: #3a2f1a;
    --low: #aeb8c4; --low-bg: #232a3a; --ok: #7fd99a; --ok-bg: #1c3326;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* ---------- hero ---------- */
.hero {
  background:
    radial-gradient(1100px 420px at 15% -10%, color-mix(in srgb, var(--accent) 26%, transparent), transparent 60%),
    radial-gradient(900px 380px at 95% 0%, color-mix(in srgb, #17b26a 18%, transparent), transparent 60%),
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 10%, var(--bg)), var(--bg));
  border-bottom: 1px solid var(--line);
}
.hero-inner { max-width: 1080px; margin: 0 auto; padding: 44px 20px 30px; }
.brand { margin: 0 0 14px; font-weight: 800; font-size: 1.25rem; letter-spacing: .01em; }
.brand-ai { color: var(--accent); }
h1 { margin: 0; font-size: clamp(1.8rem, 4.5vw, 2.7rem); line-height: 1.15; letter-spacing: -.015em; }
.tagline { margin: 14px 0 0; color: var(--muted); font-size: 1.08rem; max-width: 66ch; }
.tagline b { color: var(--ink); }
.tagline-why {
  font-size: .95rem; max-width: 78ch; margin-top: 12px;
  border-left: 3px solid var(--accent); padding-left: 12px;
}
.hero-badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; }
.hb {
  font-size: .82rem; font-weight: 600; color: var(--muted);
  border: 1px solid var(--line); background: var(--card);
  border-radius: 999px; padding: 5px 12px;
}
.hero-example {
  margin-top: 22px; background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px; max-width: 860px;
  box-shadow: 0 8px 30px rgb(0 0 0 / 7%);
}
.hx-title { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin-bottom: 10px; }
.hx-row { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; padding: 7px 0; border-top: 1px solid var(--line); font-size: .92rem; }
.hx-row:first-of-type { border-top: none; }
.hx-row code { font-family: var(--mono); font-size: .84rem; }
.hx-note { color: var(--muted); font-size: .86rem; }
.hero-disclaimer { margin: 16px 0 0; color: var(--muted); font-size: .85rem; max-width: 80ch; }
main { max-width: 1080px; margin: 0 auto; padding: 12px 20px 40px; }
footer { max-width: 1080px; margin: 0 auto; padding: 0 20px 40px; color: var(--muted); font-size: .85rem; }
a { color: var(--accent); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; margin-top: 18px; box-shadow: 0 1px 2px rgb(0 0 0 / 4%);
}
h2 { margin: 0 0 10px; font-size: 1.2rem; }
.section-summary { color: var(--muted); margin: 0 0 12px; }
.fineprint { color: var(--muted); font-size: .82rem; margin: 10px 0 0; }
.msg { color: var(--muted); font-size: .9rem; min-height: 1.2em; margin: 8px 0 0; }
.msg.error { color: var(--high); }

#dropzone {
  border: 2px dashed var(--line); border-radius: 10px; padding: 34px 16px;
  text-align: center; cursor: pointer; transition: border-color .15s, background .15s;
}
#dropzone:hover, #dropzone:focus-visible, #dropzone.drag { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, transparent); outline: none; }
.dz-big { margin: 0; font-weight: 600; }
.dz-small { margin: 6px 0 0; color: var(--muted); font-size: .88rem; }

.demo-row { margin: 10px 0 0; color: var(--muted); font-size: .9rem; }
button.linklike {
  background: none; border: none; padding: 0; font: inherit; cursor: pointer;
  color: var(--accent); font-weight: 600; text-decoration: underline;
}
button.linklike:hover { filter: brightness(1.15); }

.file-list { list-style: none; margin: 12px 0 0; padding: 0; }
.file-list li {
  display: flex; align-items: center; gap: 10px; padding: 7px 10px;
  border: 1px solid var(--line); border-radius: 8px; margin-top: 6px; font-size: .92rem;
}
.file-list .kind { font-family: var(--mono); font-size: .75rem; background: var(--low-bg); color: var(--low); padding: 2px 7px; border-radius: 5px; text-transform: uppercase; }
.file-list .size { color: var(--muted); margin-left: auto; }
.file-list button { border: none; background: none; color: var(--muted); cursor: pointer; font-size: 1rem; }
.file-list button:hover { color: var(--high); }

.controls { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.mailto-label { font-size: .85rem; color: var(--muted); display: flex; flex-direction: column; gap: 3px; }
.mailto-label input {
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  border-radius: 7px; padding: 7px 10px; font-size: .9rem; min-width: 230px;
}
button.primary {
  background: var(--accent); color: var(--accent-ink); border: none; border-radius: 8px;
  padding: 10px 20px; font-size: .95rem; font-weight: 600; cursor: pointer;
}
button.primary:disabled { opacity: .45; cursor: not-allowed; }
button.primary:not(:disabled):hover { filter: brightness(1.08); }
button.ghost {
  background: none; border: 1px solid var(--line); color: var(--muted);
  border-radius: 8px; padding: 9px 16px; font-size: .9rem; cursor: pointer;
}
button.ghost:hover { border-color: var(--accent); color: var(--accent); }

.progressbar { height: 10px; background: var(--low-bg); border-radius: 6px; overflow: hidden; margin: 8px 0; }
#progress-fill { height: 100%; width: 0%; background: var(--accent); transition: width .25s; }
#progress-label { color: var(--muted); font-size: .88rem; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .87rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; }
th.chk, td.chk { width: 30px; }
td .evidence { font-family: var(--mono); font-size: .8rem; color: var(--muted); display: block; max-width: 46ch; overflow-wrap: anywhere; }
td .mark { background: color-mix(in srgb, var(--high) 22%, transparent); border-radius: 3px; padding: 0 2px; }
td code, .key { font-family: var(--mono); font-size: .82rem; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; }
.badge.high { color: var(--high); background: var(--high-bg); }
.badge.medium { color: var(--medium); background: var(--medium-bg); }
.badge.low { color: var(--low); background: var(--low-bg); }
.badge.verified { color: var(--ok); background: var(--ok-bg); }
.badge.fixable { color: var(--medium); background: var(--medium-bg); }
.badge.suspect { color: var(--medium); background: var(--medium-bg); }
.badge.notfound { color: var(--high); background: var(--high-bg); }
.badge.unverifiable, .badge.skipped, .badge.checking { color: var(--low); background: var(--low-bg); }
.badge.checking { animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .45; } }
.badge.error { color: var(--high); background: var(--high-bg); }

select.action {
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  border-radius: 6px; padding: 4px 8px; font-size: .85rem;
}
tr.row-removed td { opacity: .5; text-decoration: line-through; }

.downloads { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.downloads a {
  display: inline-block; border: 1px solid var(--accent); color: var(--accent);
  border-radius: 8px; padding: 9px 16px; text-decoration: none; font-size: .9rem; font-weight: 600;
}
.downloads a:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.downloads a.big { background: var(--accent); color: var(--accent-ink); }

details { margin-top: 14px; }
summary { cursor: pointer; color: var(--muted); }
#changelog { font-size: .85rem; color: var(--muted); }
#changelog li { margin: 4px 0; }
.notice { padding: 10px 12px; border-radius: 8px; background: var(--medium-bg); color: var(--medium); font-size: .87rem; margin-top: 10px; }

/* show more/less in Cited-as column */
.more-toggle { background: none; border: none; padding: 0; color: var(--accent); cursor: pointer; font-size: .82rem; font-weight: 600; }
.more-toggle:hover { text-decoration: underline; }
td .cited-full { overflow-wrap: anywhere; }

/* search-elsewhere links on unmatched rows */
.ext-search { margin-top: 4px; font-size: .78rem; color: var(--muted); }
.ext-search a { margin-right: 8px; white-space: nowrap; }

/* ---------- about / support ---------- */
.about-line { color: var(--muted); max-width: 78ch; }
.support-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; margin-top: 14px; }
.support-box { border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; background: var(--bg); }
.support-title { margin: 0 0 6px; font-weight: 700; }
.support-box p { margin: 0 0 10px; color: var(--muted); font-size: .9rem; }
.star-btn {
  display: inline-block; background: var(--accent); color: var(--accent-ink);
  border-radius: 8px; padding: 9px 18px; text-decoration: none; font-weight: 700; font-size: .92rem;
}
.star-btn:hover { filter: brightness(1.08); }
.bibtex {
  font-family: var(--mono); font-size: .74rem; line-height: 1.45; background: var(--card);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px;
  overflow-x: auto; margin: 0 0 10px; white-space: pre;
}

/* hero checklist + structured fineprints */
.hero-points { list-style: none; margin: 12px 0 0; padding: 0; max-width: 72ch; }
.hero-points li { padding: 3px 0; color: var(--muted); font-size: .98rem; }
.hero-points b { color: var(--ink); }
.fineprint-list { margin: 10px 0 0; padding-left: 18px; }
.fineprint-list li { margin: 3px 0; }