/* Stockfish Exchange — terminal design system.
   Near-black surfaces, 1px borders, mono micro-labels, one purple accent; green/red only for numbers. */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Inter:wght@400;500;600;800&display=swap');

:root {
  --bg: #000000;
  --panel: #0c0c0c;
  --panel-2: #141414;
  --panel-3: #1b1b1b;
  --border: #1f1f1f;
  --border-2: #2b2b2b;
  --text: #ffffff;
  --muted: #8a8a8a;
  --muted-2: #5a5a5a;
  --accent: #00c805;
  --accent-2: #00a804;
  --accent-dim: rgba(0, 200, 5, 0.10);
  --up: #00c805;
  --down: #ff5000;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --light-sq: #3d4a40;
  --dark-sq: #252d27;
  --sel: rgba(0, 200, 5, 0.45);
  --last: rgba(0, 200, 5, 0.28);
  --hint: rgba(0, 200, 5, 0.5);
  --board: min(calc(100vh - 250px), 640px);
  --sq: calc(var(--board) / 8);
  --nav-h: 64px;
  --tape-h: 34px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.5 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
button, select, input { font: inherit; color: inherit; }
.mono { font-family: var(--mono); }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.up { color: var(--up); } .down { color: var(--down); } .muted { color: var(--muted); }
.label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }
[hidden] { display: none !important; }

/* ---------- top nav ---------- */
.nav-bar { height: var(--nav-h); display: flex; align-items: center; gap: 26px; padding: 0 22px; border-bottom: 1px solid var(--border); background: var(--bg); position: sticky; top: 0; z-index: 20; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); font-family: var(--mono); font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; font-size: 12px; white-space: nowrap; }
.brand img { width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--border-2); }
.nav-links { display: flex; gap: 4px; }
.nav-links a { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); padding: 8px 12px; border-radius: 4px; }
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); }
.nav-pill { margin-left: 6px; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; border: 1px solid var(--accent-2); color: var(--accent); border-radius: 6px; padding: 5px 14px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; background: var(--accent-dim); line-height: 1.2; text-decoration: none; }
.nav-pill b { font-size: 12px; letter-spacing: 0.02em; text-transform: none; font-weight: 700; }
.nav-spacer { flex: 1; }
.wallet-slot { display: flex; align-items: center; gap: 10px; }
.btn { display: inline-block; border: 1px solid var(--border-2); background: var(--panel-2); color: var(--text); padding: 8px 14px; border-radius: 6px; cursor: pointer; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; transition: background 0.12s, border-color 0.12s; white-space: nowrap; text-align: center; box-sizing: border-box; line-height: 1.4; }
.btn:hover:not(:disabled) { background: var(--panel-3); border-color: #3a3a48; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #000; font-weight: 700; }
.btn.primary:hover:not(:disabled) { background: #1fd424; border-color: #1fd424; }
.btn.outline { background: transparent; border-color: var(--accent-2); color: var(--accent); }
.btn.on { border-color: var(--accent); color: var(--accent); }
.btn.sm { padding: 5px 10px; font-size: 11px; }
.btn.block { display: block; width: 100%; }
.wallet-pill { display: flex; align-items: center; gap: 10px; border: 1px solid var(--accent-2); background: var(--accent-dim); color: var(--accent); border-radius: 6px; padding: 8px 14px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; white-space: nowrap; }
.wallet-pill .num { color: var(--muted); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted-2); flex: none; }
.dot.on { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.dot.err { background: var(--down); }
.dot.live { background: var(--down); box-shadow: 0 0 8px var(--down); animation: blink 1.2s infinite; }
.dot.green { background: var(--up); box-shadow: 0 0 8px var(--up); }
@keyframes blink { 50% { opacity: 0.3; } }

/* ---------- ticker tape ---------- */
.tape { height: var(--tape-h); border-bottom: 1px solid var(--border); overflow: hidden; display: flex; align-items: center; background: var(--bg); }
.tape-track { display: inline-flex; gap: 0; white-space: nowrap; font-family: var(--mono); font-size: 12px; animation: tape 80s linear infinite; }
.tape-track .q { display: inline-flex; align-items: center; gap: 8px; padding: 0 22px; border-right: 1px solid var(--border); }
.tape-track .q span { color: var(--muted); letter-spacing: 0.08em; }
.tape-track .q b { color: var(--text); font-weight: 700; }
.tape-track .q .d { font-size: 11px; }
@keyframes tape { to { transform: translateX(-50%); } }
.tape:hover .tape-track { animation-play-state: paused; }

/* ---------- three-column shell ---------- */
.shell { display: grid; grid-template-columns: 300px minmax(0, 1fr) 330px; gap: 18px; padding: 18px 22px 40px; align-items: start; max-width: 1720px; margin: 0 auto; }
.rail { border: 1px solid var(--border); border-radius: 8px; background: var(--panel); overflow: hidden; position: sticky; top: calc(var(--nav-h) + 18px); max-height: calc(100vh - var(--nav-h) - 40px); display: flex; flex-direction: column; }
.rail-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.rail-head .live { display: inline-flex; align-items: center; gap: 8px; }
.rail-body { overflow-y: auto; }
.row { display: grid; grid-template-columns: 34px 1fr auto; gap: 12px; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); cursor: default; transition: background 0.1s; }
.row:hover { background: var(--panel-2); }
.row.link { cursor: pointer; }
.row.active { background: var(--accent-dim); }
.row .ic { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--border-2); background: var(--panel-2); display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 10px; font-weight: 700; color: var(--muted); letter-spacing: 0.04em; }
.row .ic.acc { color: var(--accent); border-color: var(--accent-2); }
.row .t { font-family: var(--mono); font-weight: 700; font-size: 13px; letter-spacing: 0.04em; }
.row .s { color: var(--muted); font-size: 11.5px; margin-top: 2px; }
.row .v { text-align: right; font-family: var(--mono); font-size: 13px; font-weight: 700; }
.row .v small { display: block; font-size: 11px; font-weight: 500; margin-top: 2px; }
.row.two { grid-template-columns: 1fr auto; }
.row .l1 { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 12.5px; font-weight: 700; letter-spacing: 0.04em; }
.row .l2 { display: flex; gap: 8px; color: var(--muted); font-family: var(--mono); font-size: 11.5px; margin-top: 4px; }
.row .r1 { text-align: right; color: var(--muted); font-family: var(--mono); font-size: 11px; }
.row .r2 { text-align: right; font-family: var(--mono); font-size: 12px; font-weight: 700; margin-top: 4px; }
.tag { font-family: var(--mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; padding: 2px 6px; border-radius: 3px; border: 1px solid var(--border-2); color: var(--muted); }
.tag.acc { color: var(--accent); border-color: var(--accent-2); }
.tag.up { color: var(--up); border-color: rgba(34,197,94,0.5); }
.tag.down { color: var(--down); border-color: rgba(239,68,68,0.5); }
.pill { display: inline-flex; align-items: center; gap: 7px; padding: 4px 11px; border-radius: 999px; border: 1px solid var(--border-2); font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.pill.acc { color: var(--accent); border-color: var(--accent-2); background: var(--accent-dim); }
.pill.up { color: var(--up); border-color: rgba(34,197,94,0.45); background: rgba(34,197,94,0.08); }
.pill.down { color: var(--down); border-color: rgba(239,68,68,0.45); background: rgba(239,68,68,0.08); }

/* ---------- panels ---------- */
.main { display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.panel { border: 1px solid var(--border); border-radius: 8px; background: var(--panel); }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; padding: 12px 18px; border-bottom: 1px solid var(--border); }
.panel-body { padding: 18px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: var(--panel); }
.stats .cell { display: flex; align-items: center; gap: 14px; padding: 16px 18px; border-right: 1px solid var(--border); min-width: 0; }
.stats .cell:last-child { border-right: 0; }
.stats .cell .label { line-height: 1.5; }
.stats .cell .val { font-family: var(--mono); font-size: 20px; font-weight: 700; letter-spacing: -0.02em; margin-left: auto; white-space: nowrap; }
.stats .cell.acc { background: var(--accent-dim); }
.stats .cell.acc .label, .stats .cell.acc .val { color: var(--accent); }
.tabs { display: flex; align-items: center; gap: 4px; border-bottom: 1px solid var(--border); padding: 0 6px; }
.tabs button { background: transparent; border: 0; border-bottom: 2px solid transparent; color: var(--muted); padding: 14px 14px; font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.2em; text-transform: uppercase; cursor: pointer; margin-bottom: -1px; }
.tabs button:hover { color: var(--text); }
.tabs button.active { color: var(--text); border-bottom-color: var(--text); }
.tabs .right { margin-left: auto; display: flex; gap: 6px; padding-right: 10px; }
.seg { display: inline-flex; border: 1px solid var(--border-2); border-radius: 5px; overflow: hidden; }
.seg button { background: transparent; border: 0; color: var(--muted); padding: 6px 12px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; cursor: pointer; border-right: 1px solid var(--border-2); }
.seg button:last-child { border-right: 0; }
.seg button.active { background: var(--text); color: #000; }
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th { text-align: left; padding: 12px 18px; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); font-weight: 500; border-bottom: 1px solid var(--border); }
.table td { padding: 16px 18px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table tr:hover td { background: var(--panel-2); }
.table .name { font-family: var(--mono); font-weight: 700; font-size: 15px; }
.table .sub { color: var(--muted); font-size: 12px; margin-top: 3px; }
.table .r { text-align: right; font-family: var(--mono); font-weight: 700; }
.empty { color: var(--muted); font-size: 13px; padding: 24px 18px; font-family: var(--mono); }
.kv { display: grid; grid-template-columns: 1fr auto; gap: 8px 14px; font-size: 12.5px; }
.kv span { color: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }
.kv b { font-family: var(--mono); font-weight: 700; text-align: right; }
.note { color: var(--muted); font-size: 12px; margin-top: 10px; line-height: 1.5; min-height: 16px; }
.note.warn { color: var(--down); }
.field { margin-bottom: 14px; }
.field > .label { display: flex; justify-content: space-between; margin-bottom: 8px; }
.field .fv { color: var(--text); }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.range-hints { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted-2); margin-top: 4px; }
select, input[type="number"], input[type="text"] { width: 100%; padding: 10px 12px; border-radius: 6px; border: 1px solid var(--border-2); background: var(--panel-2); font-family: var(--mono); font-size: 14px; color: var(--text); }
select:focus, input:focus { outline: 1px solid var(--accent-2); }
.amount-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.amount-row input { flex: 1; min-width: 120px; }
.amount-row .unit { color: var(--muted); font-family: var(--mono); font-size: 12px; }
.quick { display: flex; gap: 4px; }
.quick button { border: 1px solid var(--border-2); background: transparent; color: var(--muted); border-radius: 4px; padding: 6px 8px; cursor: pointer; font-family: var(--mono); font-size: 11px; }
.quick button:hover { color: var(--text); background: var(--panel-2); }
.quote { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; margin: 12px 0 14px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 6px; background: var(--panel-2); }
.quote span { color: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }
.quote b { font-family: var(--mono); font-weight: 700; text-align: right; }
.quote .big { color: var(--accent); font-size: 16px; }
.actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.footer-bar { border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 22px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); flex-wrap: wrap; }
.footer-bar .stats-inline { display: flex; gap: 22px; }
.footer-bar b { color: var(--text); }
.footer-bar .acc { color: var(--accent); }
.footer-bar a { color: var(--muted); }
.footer-bar a:hover { color: var(--text); }

/* ---------- board ---------- */
.board { width: var(--board); height: var(--board); display: grid; grid-template-columns: repeat(8, 1fr); grid-template-rows: repeat(8, 1fr); border-radius: 6px; overflow: hidden; border: 1px solid var(--border-2); touch-action: none; user-select: none; -webkit-user-select: none; }
.sq { position: relative; display: flex; align-items: center; justify-content: center; }
.sq.light { background: var(--light-sq); }
.sq.dark { background: var(--dark-sq); }
.sq.last::before { content: ""; position: absolute; inset: 0; background: var(--last); }
.sq.selected::before { content: ""; position: absolute; inset: 0; background: var(--sel); }
.sq.hint::before { content: ""; position: absolute; inset: 0; background: var(--hint); }
.sq.check { background: radial-gradient(circle at center, rgba(239,68,68,0.95) 0%, rgba(239,68,68,0.75) 30%, rgba(239,68,68,0) 72%), var(--light-sq); }
.sq.dark.check { background: radial-gradient(circle at center, rgba(239,68,68,0.95) 0%, rgba(239,68,68,0.75) 30%, rgba(239,68,68,0) 72%), var(--dark-sq); }
.sq.target::after { content: ""; position: absolute; width: 28%; height: 28%; border-radius: 50%; background: rgba(255,255,255,0.22); pointer-events: none; }
.sq.target.capture::after { width: 100%; height: 100%; border-radius: 50%; background: transparent; border: calc(var(--sq) * 0.09) solid rgba(255,255,255,0.22); }
.sq .coord { position: absolute; font-family: var(--mono); font-size: calc(var(--sq) * 0.17); font-weight: 600; opacity: 0.5; pointer-events: none; color: #d0d8d1; }
.sq .coord.rank { top: 3px; left: 5px; }
.sq .coord.file { bottom: 2px; right: 5px; }
.piece { font-size: calc(var(--sq) * 0.78); line-height: 1; position: relative; z-index: 2; cursor: grab; transition: transform 0.06s ease; font-family: "Apple Symbols", "Segoe UI Symbol", "DejaVu Sans", "Noto Sans Symbols2", serif; }
.piece.w { color: #ffffff; -webkit-text-stroke: calc(var(--sq) * 0.018) #0d0d0d; text-shadow: 0 1px 2px rgba(0,0,0,0.6); }
.piece.b { color: #0d0d0d; -webkit-text-stroke: calc(var(--sq) * 0.016) #b5b5b5; }
.piece.dragging-src { opacity: 0.25; }
.sq.own .piece:hover { transform: scale(1.06); }
.board.locked .piece { cursor: default; }
.drag-ghost { position: fixed; pointer-events: none; z-index: 1000; transform: translate(-50%, -50%); font-size: calc(var(--sq) * 0.9); line-height: 1; font-family: "Apple Symbols", "Segoe UI Symbol", "DejaVu Sans", "Noto Sans Symbols2", serif; filter: drop-shadow(0 6px 8px rgba(0,0,0,0.6)); }
.drag-ghost.w { color: #ffffff; -webkit-text-stroke: calc(var(--sq) * 0.018) #0d0d0d; }
.drag-ghost.b { color: #0d0d0d; -webkit-text-stroke: calc(var(--sq) * 0.016) #b5b5b5; }
.board-wrap { display: flex; gap: 10px; align-items: stretch; }
.evalbar { width: 18px; border-radius: 4px; overflow: hidden; position: relative; background: var(--panel-3); border: 1px solid var(--border-2); display: flex; flex-direction: column; justify-content: flex-end; }
.evalbar.flipped { justify-content: flex-start; }
.evalbar-fill { background: #f2f2f2; height: 50%; transition: height 0.35s ease; }
.evalbar-label { position: absolute; left: 0; right: 0; text-align: center; font-size: 9px; font-weight: 700; padding: 3px 0; color: #111; mix-blend-mode: difference; filter: invert(1) grayscale(1) contrast(9); font-family: var(--mono); }
.evalbar:not(.flipped) .evalbar-label { bottom: 0; }
.evalbar.flipped .evalbar-label { top: 0; }
.player-bar { display: flex; align-items: center; gap: 12px; padding: 8px 4px 8px 30px; min-height: 44px; }
.avatar { width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--border-2); background: var(--panel-2); display: flex; align-items: center; justify-content: center; font-size: 16px; overflow: hidden; }
.avatar img { width: 100%; height: 100%; }
.player-info { flex: 1; min-width: 0; }
.player-name { font-family: var(--mono); font-weight: 700; font-size: 12.5px; letter-spacing: 0.04em; }
.captured { color: var(--muted); font-size: 14px; letter-spacing: -1px; min-height: 16px; }
.captured .mat { color: var(--up); font-size: 11px; margin-left: 6px; letter-spacing: 0; font-family: var(--mono); font-weight: 700; }
.thinking { display: flex; gap: 4px; }
.thinking span { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: pulse 1s infinite ease-in-out; }
.thinking span:nth-child(2) { animation-delay: 0.15s; }
.thinking span:nth-child(3) { animation-delay: 0.3s; }
@keyframes pulse { 0%, 80%, 100% { transform: scale(0.5); opacity: 0.4; } 40% { transform: scale(1); opacity: 1; } }
.move-list { overflow-y: auto; max-height: 220px; display: grid; grid-template-columns: 40px 1fr 1fr; font-family: var(--mono); font-size: 12.5px; align-content: start; }
.move-list .empty { grid-column: 1 / -1; padding: 12px 0; }
.move-list .num { color: var(--muted); padding: 4px 6px; }
.move-list .mv { padding: 4px 8px; border-radius: 4px; }
.move-list .mv.current { background: var(--accent-dim); color: var(--accent); font-weight: 700; }

/* ---------- modals / toast ---------- */
.modal { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.7); display: flex; align-items: center; justify-content: center; z-index: 500; backdrop-filter: blur(3px); }
.modal[hidden] { display: none; }
.modal-box { background: var(--panel); border: 1px solid var(--border-2); border-radius: 10px; padding: 26px 30px; min-width: 340px; max-width: 92vw; text-align: center; }
.modal-title { font-family: var(--sans); font-size: 26px; font-weight: 800; letter-spacing: -0.02em; }
.modal-title.up { color: var(--up); } .modal-title.down { color: var(--down); }
.modal-sub { color: var(--muted); margin-top: 8px; line-height: 1.6; }
.modal-sub b { color: var(--text); font-family: var(--mono); }
.modal-actions { display: flex; gap: 10px; margin-top: 20px; justify-content: center; }
.promo-choices { display: flex; gap: 10px; justify-content: center; margin-top: 14px; }
.promo-choices button { width: 64px; height: 64px; border-radius: 8px; border: 1px solid var(--border-2); background: var(--light-sq); font-size: 44px; line-height: 1; cursor: pointer; font-family: "Apple Symbols", "Segoe UI Symbol", "DejaVu Sans", "Noto Sans Symbols2", serif; }
.promo-choices button.w { color: #ffffff; -webkit-text-stroke: 1.2px #0d0d0d; }
.promo-choices button.b { color: #0d0d0d; -webkit-text-stroke: 1px #b5b5b5; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--panel); border: 1px solid var(--border-2); border-radius: 8px; padding: 12px 16px; font-size: 13px; z-index: 900; max-width: 90vw; font-family: var(--mono); }
.toast.err { border-color: var(--down); }

/* ---------- responsive ---------- */
@media (max-width: 1240px) { .shell { grid-template-columns: 260px minmax(0, 1fr); } .rail.right { grid-column: 1 / -1; position: static; max-height: none; } }
@media (max-width: 900px) {
  :root { --board: min(calc(100vw - 60px), 520px); }
  .shell { grid-template-columns: 1fr; padding: 12px; gap: 12px; }
  .rail { position: static; max-height: 360px; }
  .main { order: 1; } .rail.left { order: 2; } .rail.right { order: 3; }
  .nav-links, .nav-pill { display: none; }
  .nav-bar { gap: 12px; padding: 0 14px; }
  .brand { font-size: 11px; letter-spacing: 0.1em; }
  .wallet-pill .num { display: none; }
  .stats { grid-template-columns: 1fr; }
  .stats .cell { border-right: 0; border-bottom: 1px solid var(--border); }
  .stats .cell:last-child { border-bottom: 0; }
  .actions { grid-template-columns: repeat(3, 1fr); }
}

.seg button.soon { color: var(--muted-2); cursor: default; }
.seg button:disabled { cursor: default; }
.seg button .tag { margin-left: 6px; font-size: 9px; padding: 1px 5px; }

/* ---------- Laws-of-UX pass: targets, focus, motion, disclosure ---------- */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.btn.sm { min-height: 34px; }
.nav-links a { padding: 10px 12px; }
@media (pointer: coarse) { .btn, .seg button, .quick button, .presets button, .nav-links a { min-height: 44px; } .btn.sm { min-height: 44px; } }
@media (prefers-reduced-motion: reduce) { .tape-track, .dot.live, .cursor, .thinking span, .term-dots i { animation: none !important; } * { scroll-behavior: auto !important; } }
.btn.busy { position: relative; color: transparent; }
.btn.busy::after { content: ""; position: absolute; left: 50%; top: 50%; width: 16px; height: 16px; margin: -8px 0 0 -8px; border-radius: 50%; border: 2px solid rgba(0,0,0,0.35); border-top-color: #000; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.presets { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.presets button { border: 1px solid var(--border-2); background: var(--panel-2); color: var(--text); border-radius: 6px; padding: 8px 4px; cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 2px; }
.presets button b { font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; }
.presets button small { font-family: var(--mono); font-size: 9.5px; color: var(--muted); letter-spacing: 0.06em; }
.presets button:hover { border-color: #3a3a3a; }
.presets button.active { border-color: var(--accent); background: var(--accent-dim); }
.presets button.active small { color: var(--accent); }
details.advanced { border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px; background: var(--panel-2); margin-bottom: 4px; }
details.advanced summary { display: flex; justify-content: space-between; align-items: center; cursor: pointer; list-style: none; gap: 10px; }
details.advanced summary::-webkit-details-marker { display: none; }
details.advanced summary .adv-sum { font-family: var(--mono); font-size: 11.5px; color: var(--text); }
details.advanced summary::after { content: "+"; color: var(--muted); font-family: var(--mono); margin-left: 6px; }
details.advanced[open] summary::after { content: "–"; }
.step-head .step-sum { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--accent); letter-spacing: 0.04em; text-align: right; white-space: nowrap; }
.step-head .label { flex: 1; min-width: 0; }
.eval-words { color: var(--text); font-family: var(--sans); font-weight: 600; font-size: 12.5px; }
.modal-stats { display: flex; justify-content: center; gap: 18px; margin-top: 14px; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.modal-stats b { color: var(--text); font-size: 14px; margin-right: 4px; }
.modal-actions { flex-wrap: wrap; }
.nav-pill.neutral { border-color: var(--border-2); background: var(--panel-2); color: var(--muted); flex-direction: row; gap: 8px; padding: 8px 12px; }
.nav-pill.neutral b { color: var(--text); text-transform: uppercase; letter-spacing: 0.08em; font-size: 11px; }
.nav-pill.neutral .dot { width: 7px; height: 7px; }
.resume-bar { display: flex; justify-content: center; align-items: center; gap: 10px; padding: 9px 16px; background: var(--accent-dim); border-bottom: 1px solid var(--accent-2); font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; color: var(--text); }
.resume-bar a { color: var(--accent); font-weight: 700; }

/* ---------- voxel board ---------- */
.voxel-wrap { width: var(--board); height: calc(var(--board) * 0.84); border-radius: 6px; overflow: hidden; border: 1px solid var(--border-2); background: radial-gradient(ellipse at 50% 35%, #0f130f 0%, #000 72%); position: relative; }
.voxel-canvas { display: block; width: 100% !important; height: 100% !important; touch-action: none; cursor: grab; }
.voxel-canvas:active { cursor: grabbing; }
.view-toggle { margin-top: 10px; }
.view-toggle button { padding: 5px 12px; font-size: 10.5px; }
.board-stage { display: flex; flex-direction: column; align-items: flex-end; }