/* Nim — styles.  Theme via data-theme on <html>; dark is the default. */
:root {
  --bg: #12151c; --panel: #171c26; --panel2: #1d2430; --line: #2b3347;
  --text: #e7ecf5; --dim: #97a3ba; --accent: #d9b45c; --accent2: #4ec9a8;
  --bad: #f05a4f; --good: #4ec9a8; --focus: #7aa7ff;
  --radius: 12px; --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
html[data-theme="light"] {
  --bg: #f6f7fb; --panel: #ffffff; --panel2: #eef1f7; --line: #d3dae7;
  --text: #141922; --dim: #5c6880; --accent: #a9822a; --accent2: #0f8a6a;
  --bad: #d63b30; --good: #0f8a6a; --focus: #2f6fdc;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--text); font-family: var(--sans);
  font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent2); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; background: var(--panel); padding: 8px 12px; border-radius: 8px; z-index: 20; }

.top {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; justify-content: space-between;
  max-width: 980px; margin: 0 auto; padding: 26px 20px 10px;
}
.brand h1 {
  margin: 0; font-size: clamp(34px, 7vw, 54px); letter-spacing: -0.02em; line-height: 1;
  font-weight: 800;
}
.tagline { margin: 6px 0 0; color: var(--dim); font-size: 15px; }
.top-actions { display: flex; gap: 8px; }

main { max-width: 980px; margin: 0 auto; padding: 0 20px 48px; }

button, select {
  font: inherit; color: var(--text); background: var(--panel2);
  border: 1px solid var(--line); border-radius: 9px; padding: 8px 12px; cursor: pointer;
}
button:focus-visible, select:focus-visible, input:focus-visible {
  outline: 2px solid var(--focus); outline-offset: 2px;
}
button.primary { background: var(--accent); color: #17131f; border-color: transparent; font-weight: 700; }
button.ghost:hover, select:hover { border-color: var(--accent2); }

.controls {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: end;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; margin: 14px 0;
}
.ctl { display: flex; flex-direction: column; gap: 4px; flex: 1 1 210px; min-width: 0; }
.ctl > span { font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: var(--dim); }
.ctl select { width: 100%; }

.board-panel { margin: 14px 0; }
.board-wrap {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 10px; overflow-x: auto;
}
#board { display: block; max-width: 100%; margin: 0 auto; touch-action: manipulation; }
.status { margin: 12px 0 2px; font-size: 17px; font-weight: 600; }
.status.win { color: var(--good); }
.status.lose { color: var(--bad); }
.tally { color: var(--dim); font-weight: 400; font-size: 14px; }
.hint { margin: 0; color: var(--dim); font-size: 14px; }

.lens-panel, .log-panel, .panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px; margin: 14px 0;
}
.lens-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
h2 { font-size: 19px; margin: 0 0 8px; letter-spacing: -0.01em; }
h3 { font-size: 16px; margin: 20px 0 6px; color: var(--accent2); }
.switch { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--dim); }

.lens-table { border-collapse: collapse; margin: 10px 0 6px; font-family: var(--mono); font-size: 14px; }
.lens-table th, .lens-table td { padding: 4px 9px; text-align: center; border-bottom: 1px solid var(--line); }
.lens-table thead th { color: var(--dim); font-weight: 600; font-size: 11px; text-transform: uppercase; }
.lens-table .lc-name { text-align: left; color: var(--dim); }
.lens-table .lc-g { color: var(--accent); font-weight: 700; }
.lens-table .lc-bit { color: var(--dim); width: 28px; }
.lens-table .lc-bit.on { color: var(--text); font-weight: 700; }
.lens-table tfoot td { border-bottom: none; border-top: 2px solid var(--line); padding-top: 7px; }
.lens-table .total { font-size: 17px; }
.lens-table .lc-bit.bad { color: var(--bad); }
.lens-table .lc-bit.good { color: var(--good); }
.lens-verdict { margin: 8px 0 0; font-size: 15px; }
.lens-note { margin: 8px 0 0; font-size: 14px; color: var(--accent2); }
.lens-empty { color: var(--dim); margin: 8px 0 0; }

.log { max-height: 240px; overflow-y: auto; }
.log-list { list-style: none; margin: 0; padding: 0; font-size: 14px; }
.log-item { display: flex; gap: 10px; align-items: baseline; padding: 4px 0; border-bottom: 1px solid var(--line); }
.log-who { min-width: 34px; color: var(--dim); font-weight: 700; }
.log-what { flex: 1 1 auto; }
.log-g { font-family: var(--mono); color: var(--accent); }
.log-g.zero { color: var(--good); font-weight: 700; }
.log-empty { color: var(--dim); margin: 0; }

.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 0; }
.tab { background: transparent; }
.tab.on { background: var(--panel2); border-color: var(--accent2); color: var(--text); font-weight: 700; }

.claim {
  font-size: 17px; font-style: italic; color: var(--text);
  border-left: 3px solid var(--accent); padding: 4px 0 4px 14px; margin: 10px 0 14px;
}
.aside { color: var(--dim); font-size: 14px; }
.panel ul { padding-left: 20px; }
.panel li { margin: 6px 0; }

.ktable-wrap { overflow-x: auto; margin: 10px 0; }
.ktable { border-collapse: collapse; font-family: var(--mono); font-size: 13px; }
.ktable th, .ktable td { border: 1px solid var(--line); padding: 3px 7px; text-align: center; min-width: 26px; }
.ktable .kh { color: var(--dim); font-weight: 600; background: var(--panel2); }
.ktable .kcell.exc { background: rgba(240, 90, 79, .22); color: var(--bad); font-weight: 800; }
.ktable .kcell.blank { background: transparent; border-color: transparent; }
.ktable-cap { font-size: 14px; color: var(--dim); }

.foot { max-width: 980px; margin: 0 auto; padding: 18px 20px 40px; color: var(--dim); font-size: 13px; border-top: 1px solid var(--line); }

@media (max-width: 620px) {
  .ctl { flex: 1 1 100%; }
  .top { padding-top: 18px; }
}