:root {
  --bg: #f4efe4;
  --bg-2: #ece4d3;
  --surface: #fffdf8;
  --ink: #1c2a2e;
  --muted: #66716f;
  --line: #e2d9c6;
  --accent: #0f766e;
  --accent-ink: #ffffff;
  --accent-soft: #d8efe9;
  --hot: #e0582f;
  --hot-soft: #fde6dc;
  --gold: #c99512;
  --tile: #fbf2dc;
  --tile-edge: #d9c69a;
  --tile-ink: #2a2016;
  --cell: #efe7d6;
  --cell-edge: #ddd2bb;
  --shadow: 0 1px 2px rgba(60, 40, 10, .06), 0 8px 24px rgba(60, 40, 10, .08);
  --radius: 16px;
  --t: clamp(28px, 8.4vw, 42px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11181a; --bg-2: #162024; --surface: #1a2427; --ink: #e9efed; --muted: #97a4a2;
    --line: #2a3a3e; --accent: #2dd4bf; --accent-ink: #062a26; --accent-soft: #123a36;
    --hot: #ff8a5c; --hot-soft: #3d2219; --gold: #f2c14e;
    --tile: #e9dcbc; --tile-edge: #a8925f; --tile-ink: #231a0f;
    --cell: #213034; --cell-edge: #2c3f44;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #11181a; --bg-2: #162024; --surface: #1a2427; --ink: #e9efed; --muted: #97a4a2;
  --line: #2a3a3e; --accent: #2dd4bf; --accent-ink: #062a26; --accent-soft: #123a36;
  --hot: #ff8a5c; --hot-soft: #3d2219; --gold: #f2c14e;
  --tile: #e9dcbc; --tile-edge: #a8925f; --tile-ink: #231a0f;
  --cell: #213034; --cell-edge: #2c3f44;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 15% -10%, var(--bg-2), transparent 70%),
    var(--bg);
  min-height: 100vh;
}
a { color: var(--accent); }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }

/* ---------- header ---------- */
header.top { padding: 22px 0 8px; }
.top .wrap { display: flex; align-items: center; gap: 16px; justify-content: space-between; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; color: inherit; }
.brand .logo { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; }
.brand .logo .tile { --t: 22px; font-size: 13px; }
.brand b { display: block; font-size: 1.35rem; letter-spacing: .06em; line-height: 1.1; }
.brand small { color: var(--muted); font-size: .85rem; }
.top nav { display: flex; gap: 6px; align-items: center; }
.pill {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  border-radius: 999px; padding: 6px 12px; font: inherit; font-size: .85rem;
  text-decoration: none; cursor: pointer;
}
.pill[aria-current="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.hero { padding-top: 18px; padding-bottom: 10px; }
.hero h1 { font-size: clamp(1.6rem, 4.2vw, 2.5rem); line-height: 1.15; margin: 0 0 8px; letter-spacing: -.01em; }
.hero p { margin: 0; color: var(--muted); max-width: 62ch; }

/* ---------- layout ---------- */
.app { display: grid; gap: 20px; padding-top: 18px; padding-bottom: 40px; }
@media (min-width: 980px) { .app { grid-template-columns: minmax(0, 470px) minmax(0, 1fr); align-items: start; } .results-col { position: sticky; top: 16px; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; }
.card h2 { font-size: 1.05rem; margin: 0 0 12px; display: flex; align-items: center; gap: 8px; }
.card h2 .n { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: .75rem; }

/* mode switch */
.mode { display: grid; grid-template-columns: 1fr 1fr; background: var(--cell); border-radius: 12px; padding: 4px; margin-bottom: 16px; }
.mode button { border: 0; background: transparent; color: var(--muted); font: inherit; font-weight: 600; padding: 9px 8px; border-radius: 9px; cursor: pointer; }
.mode button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.mode button[data-mode="jarnac"][aria-pressed="true"] { color: var(--hot); }

/* ---------- tiles ---------- */
.tile {
  width: var(--t); height: var(--t);
  display: inline-grid; place-items: center;
  background: linear-gradient(180deg, var(--tile), color-mix(in srgb, var(--tile) 88%, var(--tile-edge)));
  color: var(--tile-ink);
  border-radius: calc(var(--t) * .18);
  box-shadow: inset 0 -3px 0 var(--tile-edge), 0 1px 2px rgba(0,0,0,.18);
  font-weight: 800; font-size: calc(var(--t) * .52);
  user-select: none;
}
.tile.add { background: linear-gradient(180deg, #ffb08f, #f2774c); color: #3a1204; box-shadow: inset 0 -3px 0 #c4502a, 0 1px 2px rgba(0,0,0,.2); }
.tile.l1 { background: linear-gradient(180deg, #ffe08a, #f5c542); box-shadow: inset 0 -3px 0 #c99512, 0 1px 2px rgba(0,0,0,.2); }
.tile.l2 { background: linear-gradient(180deg, #ff9f8f, #f26d5b); box-shadow: inset 0 -3px 0 #c44a3a, 0 1px 2px rgba(0,0,0,.2); }
.tile.l3 { background: linear-gradient(180deg, #a6e3e0, #5fc4c4); box-shadow: inset 0 -3px 0 #3b9a9a, 0 1px 2px rgba(0,0,0,.2); }
.tile.l4 { background: linear-gradient(180deg, #eef1f3, #d9e2e6); box-shadow: inset 0 -3px 0 #a9b6bc, 0 1px 2px rgba(0,0,0,.2); }
.tile.l5 { background: linear-gradient(180deg, #c3eb9c, #8bc66a); box-shadow: inset 0 -3px 0 #5e9a44, 0 1px 2px rgba(0,0,0,.2); }
.tile.l6 { background: linear-gradient(180deg, #d4c0ff, #a283ff); box-shadow: inset 0 -3px 0 #7458d4, 0 1px 2px rgba(0,0,0,.2); }
.cellbox {
  width: var(--t); height: var(--t); border-radius: calc(var(--t) * .18);
  background: var(--cell); box-shadow: inset 0 1px 2px var(--cell-edge);
  display: inline-grid; place-items: center;
}

/* ---------- board ---------- */
.board { --t: clamp(27px, 8.2vw, 40px); }
.scale, .row { display: grid; grid-template-columns: 22px repeat(9, var(--t)) 1fr; gap: 4px; align-items: center; }
.scale span { text-align: center; font-size: .68rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.scale span.on { color: var(--gold); font-weight: 700; }
.row { position: relative; margin-top: 5px; border-radius: 10px; }
.row .idx { font-size: .75rem; color: var(--muted); text-align: right; padding-right: 2px; }
.row .pts { font-size: .78rem; color: var(--muted); padding-left: 6px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.row .pts.bad { color: var(--hot); }
.row input, .hand input {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0; border: 0; font-size: 16px; cursor: text;
}
.row:focus-within, .hand:focus-within { outline: 2px solid var(--accent); outline-offset: 3px; }
.row:focus-within .cellbox.cur, .hand:focus-within .cellbox.cur { box-shadow: inset 0 0 0 2px var(--accent); animation: blink 1.1s steps(2) infinite; }
@keyframes blink { 50% { box-shadow: inset 0 1px 2px var(--cell-edge); } }

.hand-wrap { margin-top: 18px; }
.hand { --t: clamp(27px, 8.2vw, 36px); position: relative; display: flex; flex-wrap: wrap; gap: 4px; padding: 10px; min-height: calc(var(--t) + 20px); border: 1px dashed var(--tile-edge); border-radius: 12px; background: color-mix(in srgb, var(--cell) 50%, transparent); }
.hint { font-size: .8rem; color: var(--muted); margin: 6px 2px 0; }
.label { font-weight: 600; font-size: .9rem; margin: 0 0 6px; display: flex; justify-content: space-between; }
.label span { color: var(--muted); font-weight: 400; }

.actions { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink); padding: 9px 14px; border-radius: 10px; font: inherit; font-weight: 600; cursor: pointer; }
.btn:hover { border-color: var(--accent); }

/* ---------- results ---------- */
.status { color: var(--muted); font-size: .9rem; }
.best {
  border-radius: 14px; padding: 14px 16px; margin-bottom: 14px;
  background: linear-gradient(135deg, var(--accent-soft), transparent 80%);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.best.jarnac { background: linear-gradient(135deg, var(--hot-soft), transparent 80%); border-color: color-mix(in srgb, var(--hot) 40%, transparent); }
.best .k { font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 700; }
.best .w { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 6px; --t: clamp(28px, 6vw, 38px); }
.best .from { color: var(--muted); font-size: .9rem; }
.gain { font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.jarnac .gain, .group.jarnac .gain { color: var(--hot); }
.group { border-top: 1px solid var(--line); padding: 14px 0 4px; }
.group:first-of-type { border-top: 0; }
.group h3 { margin: 0 0 10px; display: flex; align-items: center; gap: 10px; font-size: .95rem; flex-wrap: wrap; }
.group h3 .src { --t: 24px; display: inline-flex; gap: 2px; }
.group h3 .count { color: var(--muted); font-weight: 400; font-size: .85rem; }
.list { display: flex; flex-wrap: wrap; gap: 8px; }
.cand {
  --t: 22px; display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 8px 5px 6px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); text-decoration: none; color: inherit;
}
.cand:hover { border-color: var(--accent); }
.cand .tiles { display: inline-flex; gap: 2px; }
.cand .gain { font-size: .82rem; }
.none { color: var(--muted); font-style: italic; font-size: .9rem; }
.more { margin-top: 8px; }
.warn { color: var(--hot); font-size: .85rem; margin: 0 0 8px; }

/* ---------- content ---------- */
.content { padding-top: 10px; padding-bottom: 30px; display: grid; gap: 20px; }
@media (min-width: 860px) { .content { grid-template-columns: 1fr 1fr; } }
.content h2 { margin-top: 0; font-size: 1.2rem; }
.content p, .content li { color: var(--muted); }
.content strong { color: var(--ink); }
.scoretable { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; margin: 12px 0; text-align: center; }
.scoretable div { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 6px 2px; }
.scoretable b { display: block; font-size: 1.05rem; }
.scoretable span { font-size: .72rem; color: var(--muted); }
details { border-top: 1px solid var(--line); padding: 10px 0; }
details summary { cursor: pointer; font-weight: 600; }
details p { margin: 8px 0 0; }

footer { border-top: 1px solid var(--line); padding: 20px 0 30px; color: var(--muted); font-size: .82rem; }
footer p { margin: 4px 0; }

/* invalid row: tiles get an orange outline (visible even when .pts is hidden) */
.row.bad .tile { box-shadow: inset 0 -3px 0 var(--tile-edge), 0 0 0 2px var(--hot); }

/* phones: drop the points column and size cells from the viewport width */
@media (max-width: 560px) {
  .card { padding: 14px; }
  .board { --t: clamp(24px, calc((100vw - 120px) / 9), 40px); }
  .scale, .row { grid-template-columns: 18px repeat(9, var(--t)); }
  .row .pts { display: none; }
  .hand { --t: clamp(24px, calc((100vw - 120px) / 9), 36px); }
}

/* ---------- compact layout (fits the tool on one laptop screen) ---------- */
header.top { padding: 10px 0 0; }
.brand .logo .tile { --t: 19px; font-size: 11px; }
.brand b { font-size: 1.15rem; }
.hero { padding-top: 6px; padding-bottom: 0; }
.hero h1 { font-size: clamp(1.3rem, 3vw, 1.75rem); margin-bottom: 4px; }
.hero p { font-size: .93rem; }
.app { gap: 14px; padding-top: 12px; padding-bottom: 24px; }
.card { padding: 12px 14px; }
.card h2 { font-size: .95rem; margin-bottom: 6px; }
.mode { margin-bottom: 10px; }
.mode button { padding: 6px 8px; }
.board { --t: clamp(26px, 8.2vw, 33px); }
.scale, .row { gap: 3px; }
.row { margin-top: 3px; }
.hint { font-size: .76rem; margin-top: 4px; }
.hand-wrap { margin-top: 10px; }
.hand { --t: clamp(24px, 8.2vw, 30px); padding: 6px; min-height: calc(var(--t) + 12px); }
.actions { margin-top: 10px; }
.btn { padding: 6px 12px; font-size: .9rem; }
.best { padding: 10px 12px; margin-bottom: 8px; }
.best .w { --t: clamp(26px, 5vw, 32px); margin-top: 4px; }
.group { padding: 10px 0 2px; }
.group h3 { margin-bottom: 8px; }
.list { gap: 6px; }
@media (min-width: 980px) {
  /* results scroll inside their card instead of stretching the page */
  .results-col { max-height: calc(100vh - 28px); overflow-y: auto; top: 14px; }
}
@media (max-width: 560px) {
  .board { --t: clamp(24px, calc((100vw - 110px) / 9), 34px); }
}
.hero p { max-width: 95ch; }
.card h2 .actions { margin: 0 0 0 auto; gap: 6px; }
.card h2 .actions .btn { padding: 4px 10px; font-size: .82rem; font-weight: 600; }

/* phones/tablets: best move pinned to the bottom, tap to jump to the results */
.mbest {
  position: fixed; left: 10px; right: 10px; bottom: 10px; z-index: 10;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 8px 12px; border-radius: 14px; cursor: pointer; text-align: left;
  font: inherit; color: var(--ink);
  background: var(--surface); border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 6px 24px rgba(0, 0, 0, .18);
  --t: clamp(20px, 6vw, 26px);
}
.mbest.jarnac { border-color: color-mix(in srgb, var(--hot) 50%, transparent); }
.mbest .k { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 700; width: 100%; }
.mbest .tiles { display: inline-flex; gap: 2px; }
.mbest .go { margin-left: auto; color: var(--accent); font-weight: 700; font-size: .85rem; }
@media (min-width: 980px) { .mbest { display: none !important; } }
@media (max-width: 979px) { body.has-mbest footer { padding-bottom: 90px; } }