:root {
  --bg: #f4efe5;
  --paper: #fffcf6;
  --ink: #2a251f;
  --muted: #877e71;
  --line: #e4d9c6;
  --dot-off: rgba(42, 37, 31, 0.09);
  --dot-on: #2a251f;
  --dot-hi: #5a5248;
  --accent: #c0532a;
  --ok: #2f8a55;
  --bad: #c0392b;
  --skip: #b7791f;
  --shadow: 0 1px 2px rgba(60, 40, 10, .06), 0 8px 24px rgba(60, 40, 10, .07);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
/* Dark: follows the system unless a theme was picked */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #181613;
    --paper: #221f1b;
    --ink: #eee6d8;
    --muted: #9a9083;
    --line: #36312a;
    --dot-off: rgba(255, 255, 255, 0.07);
    --dot-on: #eee6d8;
    --dot-hi: #ffffff;
    --accent: #e57c4f;
    --ok: #52b67c;
    --bad: #e2675a;
    --skip: #e0a84a;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  }
}
:root[data-theme="dark"] {
    --bg: #181613;
    --paper: #221f1b;
    --ink: #eee6d8;
    --muted: #9a9083;
    --line: #36312a;
    --dot-off: rgba(255, 255, 255, 0.07);
    --dot-on: #eee6d8;
    --dot-hi: #ffffff;
    --accent: #e57c4f;
    --ok: #52b67c;
    --bad: #e2675a;
    --skip: #e0a84a;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
}
:root[data-theme="evol-blue"] {
  --bg: #0288d1;
  --paper: #5594f4;
  --ink: #ffffff;
  --muted: #dbe9ff;
  --line: #2f7fe0;
  --dot-off: rgba(255, 255, 255, 0.18);
  --dot-on: #0b2a55;
  --dot-hi: #3a6fb8;
  --accent: #ffb74d;
  --ok: #b9f6ca;
  --bad: #ffcdd2;
  --skip: #ffe082;
  --shadow: 0 1px 2px rgba(0,0,0,.15), 0 8px 24px rgba(0,0,0,.15);
}
:root[data-theme="evol-blue"] .btn.primary { color: #0b2a55; }
:root[data-theme="evol-blue"] .guess input { background: #fff; color: #1a1a1a; border-color: #0288d1; }
:root[data-theme="evol-blue"] .dot.on.extra { background: radial-gradient(circle at 35% 30%, #ffe0b2, var(--accent) 65%); }

/* Theme picker (top right, same as other projects) */
#theme-picker {
  position: fixed; top: 8px; right: 8px; z-index: 200;
  display: inline-flex; align-items: center; gap: 2px;
}
#theme-picker button {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; padding: 0;
  border-radius: 50%; border: 1px solid transparent;
  background: transparent; color: var(--ink);
  opacity: .55; cursor: pointer;
}
#theme-picker button:hover { opacity: 1; }
#theme-picker button.selected { opacity: 1; border-color: var(--line); }

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
}
.app { max-width: 820px; margin: 0 auto; padding: 48px 16px 64px; }
h1, h2 { font-family: var(--serif); font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.2rem, 6vw, 3.2rem); margin: 0 0 8px; }
h2 { font-size: 2rem; margin: 0 0 16px; text-align: center; }
.muted { color: var(--muted); }
.hl { color: var(--accent); font-weight: 600; }

.screen { display: none; }
.screen.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } }

/* ---------- Braille cell ---------- */
.cell {
  --d: 12px;
  --g: calc(var(--d) * .45);
  display: inline-grid;
  grid-template-columns: repeat(2, var(--d));
  gap: var(--g);
}
.dot {
  width: var(--d); height: var(--d);
  border-radius: 50%;
  background: var(--dot-off);
}
.dot.on {
  background: radial-gradient(circle at 35% 30%, var(--dot-hi), var(--dot-on) 65%);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .25);
}
.dot.on.extra { background: radial-gradient(circle at 35% 30%, #f3a27c, var(--accent) 65%); }

/* ---------- Home ---------- */
.hero { margin-bottom: 28px; }
.lede { max-width: 60ch; color: var(--muted); font-size: 1.05rem; margin: 0; }
.lede b { color: var(--ink); }

.levels { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.level {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "num best" "range preview" "mode preview";
  align-items: center;
  text-align: left;
  gap: 2px 12px;
  padding: 18px 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  color: inherit; font: inherit;
  cursor: pointer;
  transition: transform .15s ease, border-color .15s ease;
}
.level:hover, .level:focus-visible { transform: translateY(-2px); border-color: var(--accent); outline: none; }
.lv-num { grid-area: num; font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.lv-range { grid-area: range; font-family: var(--serif); font-size: 1.7rem; font-weight: 600; }
.lv-mode { grid-area: mode; font-size: .9rem; color: var(--muted); }
.level.hard .lv-mode { color: var(--accent); }
.lv-best { grid-area: best; font-size: .8rem; color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
.lv-preview { grid-area: preview; display: flex; gap: 8px; justify-self: end; }
.lv-preview .cell { --d: 8px; }

.level-zero { grid-column: 1 / -1; }
.level-zero .lv-range { font-size: 1.5rem; }

/* ---------- Level 0: name ---------- */
.center { text-align: center; }
.name-form { margin-top: 28px; }
.name-board { padding: 32px 20px; min-height: 160px; display: flex; align-items: center; justify-content: center; }
.name-braille { display: flex; flex-wrap: wrap; justify-content: center; gap: 28px 48px; }
.nb-word { display: flex; flex-wrap: wrap; justify-content: center; gap: clamp(12px, 3vw, 24px); }
.nb-letter { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.nb-letter .cell { --d: clamp(12px, 3.6vw, 18px); }
.nb-letter b { font: 600 1.3rem var(--serif); }
.nb-letter small { color: var(--muted); font-size: .75rem; font-variant-numeric: tabular-nums; }
.nb-other { font: 600 2rem var(--serif); color: var(--muted); line-height: 1; padding: 8px 0; }

.alphabet { margin-top: 32px; background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; }
.alphabet summary { cursor: pointer; padding: 14px 0; font-weight: 600; }
.alphabet[open] summary { border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.alphabet .cs { padding-bottom: 16px; }

.about { margin-top: 36px; color: var(--muted); font-size: .95rem; }
.about h2 { font-size: 1.3rem; text-align: left; color: var(--ink); margin: 24px 0 8px; }
.about p, .about ul { max-width: 68ch; margin: 0 0 10px; }
.about li { margin-bottom: 4px; }
.about b { color: var(--ink); }

.related { margin-top: 28px; font-size: .9rem; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px; }
.related a { color: var(--accent); text-decoration: none; font-weight: 600; }
.related a:hover { text-decoration: underline; }

.copyright { margin: 8px 0 0; font-size: .85rem; color: var(--muted); }
.copyright a { color: inherit; }

/* ---------- Cheat sheet ---------- */
.cs { display: grid; gap: 14px; overflow-x: auto; }
.cs-row { display: flex; align-items: center; gap: 12px; }
.cs-label { flex: 0 0 84px; font-size: .78rem; color: var(--muted); text-align: right; }
.cs-cells { display: grid; grid-template-columns: repeat(10, minmax(34px, 1fr)); gap: 6px; flex: 1; }
.cs-item { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.cs-item .cell { --d: 9px; }
.cs-item b { font-family: var(--serif); font-size: 1rem; }

/* ---------- Game ---------- */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.level-name { font-weight: 600; }
.stats { display: flex; gap: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }
#g-mistakes { color: var(--bad); }

.timer {
  text-align: center;
  font: 600 clamp(2.4rem, 8vw, 3.4rem)/1 var(--serif);
  font-variant-numeric: tabular-nums;
  margin-top: 28px;
}
.word-timer { text-align: center; color: var(--muted); font-size: .85rem; min-height: 1.4em; font-variant-numeric: tabular-nums; }

.board {
  margin: 22px 0 18px;
  padding: 40px 20px 28px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  text-align: center;
}
.word { display: flex; justify-content: center; flex-wrap: wrap; gap: clamp(16px, 4vw, 30px); }
.word .cell { --d: clamp(14px, 4.2vw, 22px); transition: transform .2s ease; }
.word.ok .dot.on { background: var(--ok); }
.word.ok .cell { transform: scale(1.06); }
.word.skip .dot.on { background: var(--skip); }
.answer {
  height: 2.2rem; margin-top: 18px;
  font: 600 1.6rem/2.2rem var(--serif);
  letter-spacing: .25em;
  opacity: 0; transition: opacity .2s ease;
}
.answer.show { opacity: 1; }
.answer.ok { color: var(--ok); }
.answer.skip { color: var(--skip); }
.shake { animation: shake .35s ease; }
@keyframes shake { 20%, 60% { transform: translateX(-8px); } 40%, 80% { transform: translateX(8px); } }

.guess input {
  display: block; width: 100%; max-width: 360px; margin: 0 auto;
  padding: 14px 18px;
  font: 1.3rem var(--sans); text-align: center; letter-spacing: .12em;
  color: var(--ink); background: var(--paper);
  border: 2px solid var(--line); border-radius: 12px;
  outline: none;
}
.guess input:focus { border-color: var(--accent); }

.actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.btn {
  padding: 10px 18px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink);
  font: 500 .95rem var(--sans); cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.ghost { background: transparent; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }

.cheat { display: none; margin-top: 18px; padding: 18px; background: var(--paper); border: 1px dashed var(--line); border-radius: 14px; }
.cheat.open { display: block; animation: fade .2s ease; }

/* ---------- Results ---------- */
#results { text-align: center; }
.r-score .big { font: 600 clamp(3rem, 12vw, 4.4rem)/1 var(--serif); font-variant-numeric: tabular-nums; }
.r-score .muted { margin-top: 6px; }
.record { color: var(--accent); font-weight: 700; }
.r-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 28px 0; }
.r-grid div { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.r-grid span { display: block; font-size: .78rem; color: var(--muted); }
.r-grid b { font-size: 1.15rem; font-variant-numeric: tabular-nums; }
.r-words { list-style: none; padding: 0; margin: 0 0 24px; text-align: left; border-top: 1px solid var(--line); }
.r-words li { display: grid; grid-template-columns: 1fr auto auto; gap: 16px; align-items: center; padding: 10px 4px; border-bottom: 1px solid var(--line); }
.rw-cells { display: flex; gap: 8px; flex-wrap: wrap; }
.rw-cells .cell { --d: 6px; }
.rw-word { font-family: var(--serif); font-weight: 600; letter-spacing: .08em; }
.rw-time { color: var(--muted); font-variant-numeric: tabular-nums; min-width: 64px; text-align: right; }
.r-words li.skip .rw-time { color: var(--skip); }

@media (max-width: 560px) {
  .levels { grid-template-columns: 1fr; }
  .r-grid { grid-template-columns: repeat(2, 1fr); }
  .cs-label { display: none; }
  .cs-cells { grid-template-columns: repeat(10, 28px); gap: 4px; }
  .cs-item .cell { --d: 7px; }
}