/* WordWarZ. One stylesheet, light and dark from the same tokens. No inline
   styles anywhere (CSP), so every visual state is a class here. */

:root {
  --tile: #f3d9a4;
  --tile-text: #3b2a10;
  --tile-last: #ffc96b;
  --sq: #e9e6df;
  --dl: #bfdbfe;
  --tl: #3b82f6;
  --dw: #fecaca;
  --tw: #dc2626;
  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-2: #efede8;
  --text: #1d1c1a;
  --muted: #6b6760;
  --line: #dedbd3;
  --accent: #0f766e;
  --accent-text: #ffffff;
  --accent-soft: #dff3f1;
  --ok: #1d7a4a;
  --ok-soft: #e3f3ea;
  --warn: #8a5a00;
  --warn-soft: #fbf0d9;
  --danger: #b3261e;
  --danger-soft: #fbe5e3;
  --radius: 12px;
  --shadow: 0 1px 2px rgb(0 0 0 / 6%), 0 4px 16px rgb(0 0 0 / 4%);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --sq: #2a2a30;
    --dl: #1e3a5f;
    --tl: #2563eb;
    --dw: #5f2a2a;
    --tw: #b91c1c;
    --bg: #121214;
    --surface: #1b1b1f;
    --surface-2: #25252b;
    --text: #ecebe8;
    --muted: #a19e98;
    --line: #34343b;
    --accent: #5fd0c4;
    --accent-text: #121214;
    --accent-soft: #163330;
    --ok: #5fd39a;
    --ok-soft: #173326;
    --warn: #f2c063;
    --warn-soft: #3a2e14;
    --danger: #ff8a80;
    --danger-soft: #3d1c1a;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 var(--font); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.6rem; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 0 0 0.75rem; }
h3 { font-size: 1rem; margin: 1.25rem 0 0.5rem; }
p { margin: 0 0 0.75rem; }
code { font: 0.9em var(--mono); background: var(--surface-2); padding: 0.1em 0.35em; border-radius: 4px; word-break: break-all; }
img { max-width: 100%; display: block; }
[hidden] { display: none !important; }

main { max-width: 1240px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
main.narrow { max-width: 420px; padding-top: 12vh; }
main.wide { max-width: 1600px; }
main.narrow-wide { max-width: 720px; }
.dim { opacity: 0.6; }

/* Header */
.nav { display: flex; align-items: center; gap: 1.5rem; padding: 0.6rem 1rem; background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; flex-wrap: wrap; }
.nav .brand { font-weight: 700; color: var(--text); letter-spacing: 0.02em; }
.nav nav { display: flex; gap: 0.25rem; flex: 1; flex-wrap: wrap; }
.nav nav a, .nav .who a { color: var(--muted); padding: 0.3rem 0.65rem; border-radius: 8px; }
.nav nav a:hover, .nav .who a:hover { background: var(--surface-2); text-decoration: none; color: var(--text); }
.nav a.active { color: var(--text); background: var(--surface-2); }
.nav .who { display: flex; align-items: center; gap: 0.5rem; }
.brand-title { font-size: 2rem; margin-bottom: 0.25rem; }

/* Surfaces */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); margin-bottom: 1rem; }
.card.flat { box-shadow: none; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1rem; }
.cols > .card { margin-bottom: 0; }
.cols + .card, .cols + .cols { margin-top: 1rem; }
.row { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.spacer { flex: 1; }
.muted { color: var(--muted); }
.hint { color: var(--muted); font-size: 0.85rem; font-weight: normal; }
.small-text { font-size: 0.85rem; }

/* Forms */
.stack { display: flex; flex-direction: column; gap: 0.85rem; }
.inline { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
.inline input[type=text], .inline input[type=url] { flex: 1; min-width: 12rem; }
label { display: flex; flex-direction: column; gap: 0.3rem; font-weight: 550; font-size: 0.92rem; }
label.check { flex-direction: row; align-items: center; gap: 0.5rem; font-weight: normal; }
input, select, textarea { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 0.5rem 0.65rem; width: 100%; }
input[type=checkbox], input[type=radio] { width: auto; accent-color: var(--accent); }
input[type=file] { padding: 0.35rem; }
textarea { resize: vertical; min-height: 5rem; line-height: 1.45; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
input:disabled { color: var(--muted); }
fieldset { border: 1px solid var(--line); border-radius: var(--radius); padding: 0.75rem 1rem 1rem; margin: 0; }
legend { padding: 0 0.35rem; font-weight: 600; font-size: 0.92rem; }

button, .button { font: inherit; font-weight: 550; cursor: pointer; border-radius: 8px; padding: 0.5rem 0.95rem; border: 1px solid var(--line); background: var(--surface-2); color: var(--text); display: inline-flex; align-items: center; gap: 0.4rem; justify-content: center; white-space: nowrap; }
button:hover, .button:hover { filter: brightness(0.97); text-decoration: none; }
button.primary, .button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.danger { color: var(--danger); }
button.small, .button.small { padding: 0.25rem 0.6rem; font-size: 0.85rem; }
button.link { background: none; border: none; color: var(--muted); padding: 0.3rem 0.4rem; font-weight: normal; }
button.link:hover { color: var(--text); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
form.inline-form, .actions form { display: inline; }
.actions { display: flex; gap: 0.35rem; justify-content: flex-end; flex-wrap: wrap; }

/* Messages */
.error, .ok, .warn-box { padding: 0.6rem 0.85rem; border-radius: 8px; margin: 0 0 1rem; }
.error { background: var(--danger-soft); color: var(--danger); }
.ok { background: var(--ok-soft); color: var(--ok); }
.warn-box { background: var(--warn-soft); color: var(--warn); }
#flash:empty { display: none; }
.reveal { background: var(--accent-soft); border-radius: 8px; padding: 0.85rem 1rem; }
.copyline { display: flex; gap: 0.5rem; align-items: center; margin: 0.5rem 0; }
.copyline code { flex: 1; padding: 0.45rem 0.6rem; }

/* Badges */
.badge { display: inline-block; font-size: 0.75rem; font-weight: 600; padding: 0.05rem 0.5rem; border-radius: 999px; background: var(--surface-2); color: var(--muted); vertical-align: middle; }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.err { background: var(--danger-soft); color: var(--danger); }
.badge.ok { background: var(--ok-soft); color: var(--ok); }

/* Tables */
table.list { width: 100%; border-collapse: collapse; font-size: 0.93rem; }
table.list th { text-align: left; font-weight: 600; color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; padding: 0.4rem 0.5rem; border-bottom: 1px solid var(--line); }
table.list td { padding: 0.55rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.list tr:last-child td { border-bottom: none; }
table.list td.num, table.list th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.dim td { color: var(--muted); }

/* Tabs */
.tabs { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--line); margin-bottom: 1rem; flex-wrap: wrap; }
.tabs a { padding: 0.5rem 0.9rem; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs a:hover { color: var(--text); text-decoration: none; }
.tabs a.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }


/* HTMX request indicator (HTMX's own inline style is off). */
.htmx-indicator { display: none; }
.htmx-request .htmx-indicator, .htmx-request.htmx-indicator { display: inline-block; }
.htmx-request button[type=submit] { opacity: 0.6; }

/* Library */
details summary { cursor: pointer; color: var(--muted); margin: 0.75rem 0 0.5rem; }
input.code { font: 1.4rem var(--mono); letter-spacing: 0.15em; text-transform: uppercase; text-align: center; }

@media (max-width: 600px) {
  main { padding: 1rem 0.75rem 3rem; }
  .nav { gap: 0.5rem; }
  td.thumb { width: 96px; }
  td.thumb img { width: 80px; height: 45px; }
}
.warn-text { color: var(--warn); }

/* The board. Square cells in a grid sized by class (no inline styles). */
.game { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 1.25rem; align-items: start; }
.board { display: grid; gap: 2px; width: 100%; max-width: 720px; aspect-ratio: 1; }
.board.s11 { grid-template-columns: repeat(11, 1fr); }
.board.s15 { grid-template-columns: repeat(15, 1fr); }
.board.s19 { grid-template-columns: repeat(19, 1fr); }
.cell { position: relative; aspect-ratio: 1; display: flex; align-items: center; justify-content: center; border-radius: 3px; background: var(--sq); font-size: clamp(0.45rem, 1.6vw, 0.8rem); font-weight: 650; color: var(--muted); user-select: none; }
.cell.dl { background: var(--dl); color: #1e3a8a; }
.cell.tl { background: var(--tl); color: #fff; }
.cell.dw { background: var(--dw); color: #7f1d1d; }
.cell.tw { background: var(--tw); color: #fff; }
.cell.start { background: var(--dw); color: #7f1d1d; }
.cell.tile { background: var(--tile); color: var(--tile-text); font-size: clamp(0.7rem, 2.6vw, 1.25rem); box-shadow: inset 0 -2px 0 rgb(0 0 0 / 15%); }
.cell.tile.last { background: var(--tile-last); }
.cell.tile.blank { color: #8a6a2a; font-style: italic; }
.cell sub { position: absolute; right: 2px; bottom: 0; font-size: 0.5em; font-weight: 600; }
.stepper { display: flex; gap: 0.4rem; align-items: center; margin-top: 0.75rem; flex-wrap: wrap; }
.stepper span { margin: 0 0.5rem; color: var(--muted); }
ol.moves { margin: 0; padding-left: 1.6rem; max-height: 60vh; overflow: auto; }
ol.moves li { padding: 0.15rem 0; }
ol.moves li.current, tr.current td { font-weight: 650; }
ol.moves .num { color: var(--muted); float: right; }
.small-title { font-size: 0.9rem; font-weight: normal; }
.qr { display: flex; justify-content: center; margin: 0.75rem 0; }
.qr svg { width: 240px; height: 240px; border-radius: 8px; }
.center { text-align: center; }
@media (max-width: 900px) { .game { grid-template-columns: 1fr; } }