/* ChessEye */
:root {
  --bg: #0f1115;
  --panel: #181c24;
  --panel-2: #1f2530;
  --line: #2c3442;
  --text: #e8ecf3;
  --muted: #9aa5b5;
  --accent: #34d399;      /* rank 1 */
  --accent-2: #fbbf24;    /* rank 2 / warnings */
  --accent-3: #94a3b8;    /* rank 3 */
  --danger: #f87171;
  --sq-light: #e8d3ab;
  --sq-dark: #9b6f45;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 50% -200px, #1a2030, var(--bg));
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-bottom: max(24px, env(safe-area-inset-bottom));
}

header {
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(10px + env(safe-area-inset-top)) 18px 10px;
  max-width: 980px; margin: 0 auto;
}
.brand { font-weight: 700; font-size: 20px; letter-spacing: .2px; }
.brand .knight { color: var(--accent); font-size: 24px; }
#progress { display: flex; gap: 8px; }
#progress .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--line); transition: all .25s;
}
#progress .dot.current { background: var(--accent); transform: scale(1.25); }
#progress .dot.done { background: #2f7d5f; }

main { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.step { display: none; animation: fadein .25s ease; }
.step.active { display: block; }
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } }

h1 { font-size: clamp(28px, 6vw, 42px); line-height: 1.15; margin: 28px 0 10px; }
h2 { font-size: clamp(22px, 4.5vw, 28px); margin: 18px 0 6px; }
.sub { color: var(--muted); margin: 4px 0 18px; max-width: 620px; }
.tiny { color: var(--muted); font-size: 13px; }
.center { text-align: center; }

/* ------------------------------------------------------------- buttons -- */
.btn {
  appearance: none; border: 1px solid var(--line); border-radius: 14px;
  background: var(--panel-2); color: var(--text);
  padding: 12px 18px; font-size: 16px; font-weight: 600;
  cursor: pointer; transition: transform .06s, background .2s, border-color .2s;
}
.btn:active { transform: scale(.97); }
.btn.primary {
  background: linear-gradient(135deg, #10b981, #059669);
  border-color: #0b8f6a; color: #04120c;
}
.btn.primary:disabled { filter: grayscale(.8) brightness(.6); cursor: not-allowed; }
.btn.ghost { background: transparent; }
.btn.link { background: none; border: none; color: var(--accent); padding: 8px 0; }
.btn.xl { font-size: 19px; padding: 16px 26px; border-radius: 18px; }
.btn.sm { font-size: 14px; padding: 8px 12px; border-radius: 10px; }
.btn-row { display: flex; gap: 10px; align-items: flex-start; margin: 18px 0 30px; flex-wrap: wrap; }
.btn-row .grow { flex: 1; text-align: right; }

/* ---------------------------------------------------------------- snap -- */
#step-snap { text-align: center; padding-bottom: 40px; }
#step-snap .btn.xl { display: block; margin: 26px auto 12px; min-width: 260px; }
#step-snap .btn.ghost { display: block; margin: 0 auto; }
#step-snap.drag { outline: 3px dashed var(--accent); outline-offset: -12px; border-radius: 24px; }
.privacy { color: var(--muted); font-size: 13px; margin-top: 34px; }
.privacy::before { content: "🔒 "; }

/* --------------------------------------------------------------- frame -- */
#photo-wrap {
  position: relative; width: 100%; border-radius: 14px; overflow: hidden;
  background: #000; touch-action: none; user-select: none;
}
#photo-wrap canvas.photo { width: 100%; display: block; }
#frame-overlay { position: absolute; inset: 0; pointer-events: none; }
.grid-line { stroke: rgba(56, 232, 174, .85); stroke-width: 1.2; }
.grid-line.edge { stroke: #34d399; stroke-width: 2.4; }
.your-side-tag {
  fill: #34d399; font-size: 15px; font-weight: 800; letter-spacing: 2px;
  paint-order: stroke; stroke: rgba(0,0,0,.75); stroke-width: 4px;
}
.pin {
  position: absolute; width: 48px; height: 48px; margin: -24px 0 0 -24px;
  display: grid; place-items: center; cursor: grab; touch-action: none;
}
.pin span {
  width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 4px solid var(--accent);
  box-shadow: 0 2px 10px rgba(0,0,0,.6);
  transition: transform .12s;
}
.pin.dragging span, .pin:hover span { transform: scale(1.35); }
#loupe {
  position: absolute; width: 126px; height: 126px; border-radius: 50%;
  border: 3px solid #fff; overflow: hidden; display: none;
  box-shadow: 0 6px 24px rgba(0,0,0,.7); pointer-events: none; z-index: 5;
}
#loupe.show { display: block; }
#loupe::before, #loupe::after {
  content: ""; position: absolute; background: rgba(52, 211, 153, .9);
}
#loupe::before { left: 50%; top: 0; bottom: 0; width: 1.5px; }
#loupe::after { top: 50%; left: 0; right: 0; height: 1.5px; }

/* ------------------------------------------------------------- confirm -- */
.banner {
  display: none; align-items: center; gap: 12px; flex-wrap: wrap;
  background: var(--panel-2); border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  padding: 12px 14px; border-radius: 12px; margin: 0 0 14px;
}
.banner.show { display: flex; }
.banner.king { border-left-color: var(--accent-2); animation: nudge 1.6s infinite; }
.banner .banner-actions { display: flex; gap: 8px; margin-left: auto; }
.banner .glyph { font-size: 26px; }
@keyframes nudge { 0%,100% { border-left-color: var(--accent-2);} 50% { border-left-color: #fff;} }

.confirm-cols { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .confirm-cols { grid-template-columns: minmax(0, 520px) 1fr; } }

.editor-board {
  position: relative; width: 100%; aspect-ratio: 1; border-radius: 12px;
  overflow: hidden; box-shadow: 0 8px 30px rgba(0,0,0,.45);
}
.editor-board.prompting { outline: 3px solid var(--accent-2); animation: pulse-outline 1.6s infinite; }
@keyframes pulse-outline { 50% { outline-color: rgba(251,191,36,.25); } }
.editor-photo { position: absolute; inset: 0; width: 100%; height: 100%; }
.editor-grid {
  position: absolute; inset: 0;
  display: grid; grid-template: repeat(8, 1fr) / repeat(8, 1fr);
}
.editor-grid .cell {
  appearance: none; background: transparent; border: 1px solid rgba(255,255,255,.06);
  padding: 0; cursor: pointer; position: relative;
  display: grid; place-items: center;
}
.editor-grid .cell:hover { background: rgba(52,211,153,.12); }
.editor-grid .cell.selected { background: rgba(52,211,153,.28); box-shadow: inset 0 0 0 2px var(--accent); }
.editor-grid .cell.uncertain { box-shadow: inset 0 0 0 2.5px rgba(251,191,36,.85); }
.editor-grid .glyph {
  font-size: clamp(22px, 5.2vw, 40px); line-height: 1;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,.7));
  pointer-events: none;
}
@media (min-width: 760px) { .editor-grid .glyph { font-size: 40px; } }
.piece-w { color: #fafafa; text-shadow: 0 0 2px #000, 0 0 2px #000; }
.piece-b { color: #1c1c1e; text-shadow: 0 0 2px #cfcfcf, 0 0 3px rgba(255,255,255,.8); }
.edge-label {
  position: absolute; color: #fff; font-size: 11px; font-weight: 700;
  text-shadow: 0 1px 2px #000; pointer-events: none; opacity: .85;
}
.edge-label.file { bottom: 2px; transform: translateX(-50%); }
.edge-label.rank { left: 3px; transform: translateY(-50%); }

.palette {
  display: none; margin-top: 12px; background: var(--panel);
  border: 1px solid var(--line); border-radius: 14px; padding: 12px;
}
.palette.show { display: block; }
.pal-head { color: var(--muted); font-size: 14px; margin-bottom: 8px; }
.pal-row { display: flex; gap: 8px; margin-top: 8px; }
.pal-row button {
  flex: 1; font-size: 30px; line-height: 1; padding: 8px 0;
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 10px; cursor: pointer;
}
.pal-row button.current { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(52,211,153,.4); }
.pal-row button.wide { font-size: 15px; color: var(--text); font-weight: 600; padding: 10px 0; }
.pal-row button.ghost { background: transparent; }

.controls-col { display: flex; flex-direction: column; gap: 10px; }
.ctl-label { color: var(--muted); font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .8px; margin-top: 6px; }
.seg { display: flex; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; width: fit-content; }
.seg.center { margin: 0 auto 14px; }
.seg button {
  appearance: none; border: none; background: transparent; color: var(--muted);
  padding: 10px 18px; font-size: 15px; font-weight: 600; cursor: pointer;
}
.seg button.on { background: var(--panel-2); color: var(--text); box-shadow: inset 0 -2px 0 var(--accent); }
.quick-row { display: flex; gap: 8px; flex-wrap: wrap; }

#advanced { border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; }
#advanced summary { cursor: pointer; color: var(--muted); font-weight: 600; }
.adv-body { display: flex; flex-direction: column; gap: 10px; margin-top: 10px; }
.castles { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; font-size: 14px; color: var(--muted); }
.fen-row { display: flex; gap: 8px; align-items: center; }
.fen-row input {
  flex: 1; background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; font-size: 13px;
}
.fen-row code {
  flex: 1; font-size: 12px; color: var(--muted); word-break: break-all;
  background: var(--bg); padding: 8px 10px; border-radius: 8px;
}
#problems { list-style: none; padding: 0; margin: 4px 0 0; display: flex; flex-direction: column; gap: 6px; }
#problems li { font-size: 14px; padding: 8px 12px; border-radius: 10px; }
#problems li.err { background: rgba(248,113,113,.12); color: #fda4a4; border: 1px solid rgba(248,113,113,.4); }
#problems li.warn { background: rgba(251,191,36,.1); color: #fcd34d; border: 1px solid rgba(251,191,36,.35); }

/* --------------------------------------------------------------- moves -- */
.view { display: none; }
.view.active { display: block; }
.photo-stage { position: relative; border-radius: 14px; overflow: hidden; background: #000; }
.photo-stage img { width: 100%; display: block; }
.photo-stage svg { position: absolute; inset: 0; pointer-events: none; }

.board2d { width: min(100%, 560px); display: block; margin: 0 auto; border-radius: 10px; overflow: hidden; box-shadow: 0 8px 30px rgba(0,0,0,.45); }
.sq-light { fill: var(--sq-light); }
.sq-dark { fill: var(--sq-dark); }
.svg-piece { font-size: 72px; }
.svg-piece.piece-w { fill: #fff; stroke: #26221c; stroke-width: 2.2; paint-order: stroke; }
.svg-piece.piece-b { fill: #17181b; stroke: #e9e4da; stroke-width: 2.2; paint-order: stroke; }
.coord { font-size: 15px; font-weight: 700; fill: rgba(20, 14, 6, .55); }

.arrow.rank1 { --arrow: #22c55e; }
.arrow.rank2 { --arrow: #fbbf24; }
.arrow.rank3 { --arrow: #93c5fd; }
.arrow-casing { stroke: rgba(8, 10, 12, .55); stroke-linecap: round; stroke-linejoin: round; }
.arrow-shaft { stroke: var(--arrow); stroke-linecap: round; stroke-linejoin: round; }
.arrow-head { fill: var(--arrow); stroke: rgba(8,10,12,.55); stroke-width: 1.5; }
.dest-ring { fill: none; stroke: var(--arrow); stroke-width: 3; opacity: .95; }
.dest-ring.pulse { animation: ringpulse 1.6s ease-out infinite; }
.src-dot { fill: var(--arrow); opacity: .5; }
.travel-dot { fill: #fff; stroke: var(--arrow); stroke-width: 2.5; }
@keyframes ringpulse {
  0% { transform: scale(1); opacity: .8; }
  100% { transform: scale(1.8); opacity: 0; }
}
.dest-ring.pulse { transform-box: fill-box; transform-origin: center; }

.verdict { text-align: center; font-size: 17px; font-weight: 650; margin: 14px 0 6px; }
#move-cards { display: grid; gap: 10px; grid-template-columns: 1fr; max-width: 640px; margin: 10px auto; }
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 12px 16px; color: var(--text); text-align: left;
}
.card.skeleton { color: var(--muted); animation: breathe 1.2s ease-in-out infinite; }
@keyframes breathe { 50% { opacity: .5; } }
.move-card { cursor: pointer; display: block; width: 100%; }
.move-card.active.rank1 { border-color: #22c55e; box-shadow: 0 0 0 2px rgba(34,197,94,.35); }
.move-card.active.rank2 { border-color: #fbbf24; box-shadow: 0 0 0 2px rgba(251,191,36,.35); }
.move-card.active.rank3 { border-color: #93c5fd; box-shadow: 0 0 0 2px rgba(147,197,253,.35); }
.rank-label { font-size: 12px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); }
.move-card.rank1 .rank-label { color: #22c55e; }
.move-card.rank2 .rank-label { color: #fbbf24; }
.move-card.rank3 .rank-label { color: #93c5fd; }
.san { font-size: 30px; font-weight: 800; margin: 2px 0; }
.meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.eval { font-weight: 800; font-size: 15px; padding: 2px 10px; border-radius: 999px; background: var(--panel-2); }
.eval.win { color: #4ade80; }
.eval.loss { color: #f87171; }
.eval.even { color: var(--muted); }
.tag { font-size: 12.5px; background: var(--panel-2); border: 1px solid var(--line); padding: 2px 9px; border-radius: 999px; color: var(--muted); }
.pv { color: var(--muted); font-size: 13.5px; margin-top: 4px; }