/* styles.css — Edition 024. Same design system as 001–023: dark board, steel-blue accent. */
:root {
  --bg: #0b0d10; --panel: #14181d; --panel-2: #171c22; --border: #232a31; --border-2: #2c343c;
  --ink: #e8ecef; --muted: #9aa6b2; --accent: #5db8e8; --accent-ink: #0b0d10;
  --pass: #35c07f; --pass-bg: #0f2019; --pass-bd: #1c3b2c;
  --hold: #ff5d5d; --hold-bg: #241115; --hold-bd: #47222a;
  --warn: #e8a13a; --warn-bg: #241d0f; --warn-bd: #4a3a1c;
  --radius: 6px; --maxw: 1060px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: radial-gradient(1100px 640px at 50% -14%, #191f26 0%, var(--bg) 58%), var(--bg);
  color: var(--ink); font: 15.5px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
a { color: var(--accent); }

header { padding: 24px 0 4px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; text-decoration: none; color: var(--ink); }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 16px var(--accent); }
.home { color: var(--muted); font-size: 13.5px; text-decoration: none; } .home:hover { color: var(--ink); }

.kicker { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; letter-spacing: .15em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--border-2); background: var(--panel); padding: 6px 12px; border-radius: 3px; margin: 26px 0 16px; }
h1 { font-size: clamp(26px, 4.6vw, 39px); line-height: 1.08; margin: 0 0 12px; letter-spacing: -.02em; font-weight: 700; text-wrap: balance; }
h1 .hl { color: var(--accent); }
.lede { color: var(--muted); font-size: 16.5px; max-width: 72ch; margin: 0 0 14px; } .lede strong, .lede b { color: var(--ink); }
.note { font-size: 13.5px; color: var(--muted); border: 1px solid var(--border); background: var(--panel); border-radius: 12px;
  padding: 12px 15px; max-width: 78ch; } .note b { color: var(--ink); }
.chips-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.chip-meta { font-size: 12.5px; color: var(--muted); border: 1px solid var(--border); background: var(--panel); border-radius: 8px; padding: 5px 10px; }
.chip-meta.synthetic { color: var(--accent); border-color: #1e3d52; }

.controls { margin: 20px 0 0; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; }
.tabs, .links { display: flex; flex-wrap: wrap; gap: 8px; }
.tab, .lnk { cursor: pointer; font: inherit; font-size: 13px; color: var(--ink); background: #0b0e13;
  border: 1px solid var(--border); border-radius: 9px; padding: 8px 13px; }
.tab.on, .lnk.on { border-color: var(--accent); background: #0b1a26; }
.tab .wtag { font-style: normal; font-family: var(--mono); font-size: 9.5px; color: var(--warn); margin-left: 4px; }
.goal { margin: 12px 0 0; font-size: 14px; color: var(--muted); } .goal b { color: var(--ink); }

.duel { margin: 14px 0 4px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 860px) { .duel { grid-template-columns: 1fr; } }
.pane { border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-2), var(--panel)); padding: 15px; display: flex; flex-direction: column; }
.pane h2 { font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 10px; font-weight: 700; }
.pane h2 i { font-style: normal; color: var(--accent); }

.bstep { display: grid; grid-template-columns: auto 1fr auto; gap: 4px 10px; align-items: baseline;
  border: 1px solid var(--border); border-radius: 8px; background: #0b0e13; padding: 7px 10px; margin-bottom: 6px; opacity: .45; }
.bstep b { font-size: 12px; white-space: nowrap; }
.bstep span { font-size: 11.5px; color: var(--muted); grid-column: 2; }
.bstep i { font-style: normal; font-family: var(--mono); font-size: 10.5px; color: var(--muted); }
.bstep.done { opacity: 1; border-color: var(--border-2); }
.bstep.done i { color: var(--accent); }
.bstep.next { opacity: 1; border-color: var(--accent); }

.meter { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 11.5px; color: var(--muted);
  border-top: 1px solid var(--border); margin-top: 8px; padding-top: 9px; }
.meter b { color: var(--ink); font-family: var(--mono); font-size: 12px; }

.act { margin-top: 10px; cursor: pointer; font: inherit; font-size: 13.5px; font-weight: 600; color: var(--accent-ink);
  background: var(--accent); border: 0; border-radius: 9px; padding: 10px 14px; }
.act:disabled { opacity: .55; cursor: default; }

.hint { font-size: 13px; color: var(--muted); border: 1px dashed var(--border-2); border-radius: 9px; padding: 22px 14px; text-align: center; }
.msg { border: 1px solid var(--border); border-radius: 10px; padding: 9px 12px; font-size: 13px; margin-bottom: 7px; }
.msg.me { background: #0b1a26; border-color: #1e3d52; }
.msg.bot { background: #0b0e13; }
.msg.bot table { border-collapse: collapse; margin-top: 6px; width: 100%; }
.msg.bot td { border-top: 1px solid var(--border); padding: 4px 8px 4px 0; font-size: 12.5px; }
.msg.bot td:first-child { color: var(--muted); white-space: nowrap; }
.prov { margin-top: 8px; font-size: 11px; color: var(--muted); border-top: 1px solid var(--border); padding-top: 7px; }
.call { font-family: var(--mono); font-size: 10.5px; color: var(--accent); background: #0b0e13;
  border: 1px solid var(--border); border-radius: 7px; padding: 6px 9px; margin-bottom: 7px; overflow-x: auto; white-space: nowrap; }
.call i { font-style: normal; color: var(--muted); }
.gate { border: 1px solid var(--warn-bd); background: var(--warn-bg); border-radius: 10px; padding: 10px 13px;
  font-size: 12.5px; color: var(--muted); } .gate b { color: var(--warn); }
.submit { cursor: pointer; font: inherit; font-size: 13px; font-weight: 600; color: var(--ink);
  background: #0b0e13; border: 1px solid var(--border-2); border-radius: 9px; padding: 9px 13px; }

.verdict { margin: 12px 0 0; border: 1px solid var(--border); background: #0b0e13; border-radius: 10px;
  padding: 13px 16px; font-size: 13px; color: var(--muted); line-height: 1.6; }
.verdict b { color: var(--ink); }
.verdict.ok { border-color: var(--pass-bd); background: var(--pass-bg); }

.why { margin: 22px 0 4px; display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
@media (max-width: 830px) { .why { grid-template-columns: 1fr; } }
.wcard { border: 1px solid var(--border); border-radius: 13px; background: linear-gradient(180deg, var(--panel-2), var(--panel)); padding: 15px 16px; }
.wcard h3 { font-size: 14px; margin: 0 0 7px; } .wcard h3 .n { color: var(--accent); font-family: var(--mono); margin-right: 6px; }
.wcard p { margin: 0; font-size: 12.5px; color: var(--muted); line-height: 1.55; } .wcard b { color: var(--ink); }

details.terms { margin: 14px 0 0; border: 1px solid var(--border); border-radius: 12px; background: var(--panel); }
details.terms summary { cursor: pointer; padding: 11px 15px; font-size: 13px; color: var(--muted); font-weight: 600; }
details.terms .body { padding: 2px 15px 13px; font-size: 13px; color: var(--muted); }
details.terms dt { color: var(--ink); font-weight: 600; margin-top: 8px; } details.terms dd { margin: 2px 0 0; }

footer { margin: 30px 0 34px; padding-top: 16px; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--muted); }
footer p { margin: 0 0 8px; max-width: 90ch; } footer b { color: var(--muted); }
#selftest[hidden] { display: none; }