:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1c2333;
  --muted: #5d6680;
  --accent: #2f6fde;
  --accent-text: #ffffff;
  --ok: #1f8a4c;
  --ok-bg: #e5f6ec;
  --bad: #c0392b;
  --bad-bg: #fdecea;
  --line: #dde2ee;
  --input-bg: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151c;
    --card: #1d222d;
    --text: #e8ebf3;
    --muted: #9aa3b8;
    --accent: #5b8ff0;
    --accent-text: #0b1020;
    --ok: #4cc47f;
    --ok-bg: #16301f;
    --bad: #f07466;
    --bad-bg: #3a1c19;
    --line: #2f3646;
    --input-bg: #141821;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 18px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
}
main { max-width: 560px; margin: 0 auto; }
main.wide { max-width: 1100px; }

.card {
  background: var(--card);
  border-radius: 18px;
  padding: 24px 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.08);
}
.center { text-align: center; }
h1 { font-size: 1.6rem; margin: 0 0 12px; }
h2 { font-size: 1.25rem; margin: 0 0 10px; }
h3 { font-size: 1rem; margin: 18px 0 6px; color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); margin: 20px 0; }

button {
  font: inherit;
  border: 0;
  border-radius: 12px;
  padding: 12px 18px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  cursor: pointer;
  touch-action: manipulation;
}
button:disabled { opacity: 0.5; }
button.big { font-size: 1.3rem; padding: 16px 28px; min-width: 9em; }
button.secondary { background: var(--line); color: var(--text); }
button.yes { background: var(--ok); }
button.no { background: var(--bad); }
button.small { padding: 6px 10px; font-size: 0.9rem; }

input, select, textarea {
  font: inherit;
  color: var(--text);
  background: var(--input-bg);
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
input.code { font-size: 1.6rem; letter-spacing: 0.25em; width: 8.5em; text-align: center; }
input.num { font-size: 2rem; width: 5.5em; text-align: center; font-variant-numeric: tabular-nums; }
input.num.small { width: 3.2em; }
button.sign { font-size: 1.8rem; width: 2.2em; padding: 8px 0; }

.row { display: flex; gap: 10px; justify-content: center; align-items: center; flex-wrap: wrap; margin: 14px 0; }
.rest { color: var(--muted); font-weight: 600; }

.question {
  font-size: clamp(2rem, 9vw, 3rem);
  font-weight: 700;
  margin: 18px 0 8px;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}
.question.small { font-size: 1.6rem; color: var(--muted); }
.cat { color: var(--muted); margin: 0; font-size: 0.95rem; }
.clock { font-size: 1.2rem; color: var(--muted); font-variant-numeric: tabular-nums; margin-top: 6px; }
.msg { color: var(--bad); min-height: 1.4em; }
.today { color: var(--muted); }
.hint { margin-top: 18px; padding: 12px; border-radius: 12px; background: var(--bg); font-size: 0.95rem; }

.result.ok { background: var(--ok-bg); }
.result.bad { background: var(--bad-bg); }
.verdict { font-size: 2.2rem; font-weight: 800; }
.result.ok .verdict { color: var(--ok); }
.result.bad .verdict { color: var(--bad); }
.solution { font-size: 1.4rem; }

/* Dashboard */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.kpi { background: var(--bg); border-radius: 12px; padding: 10px 12px; }
.kpi .v { font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.kpi .l { color: var(--muted); font-size: 0.85rem; }
.status { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 0.85rem; background: var(--bg); }
.status.on { background: var(--ok-bg); color: var(--ok); }
.status.off { background: var(--bad-bg); color: var(--bad); }
.scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; }
td.n { text-align: right; font-variant-numeric: tabular-nums; }
.ok-t { color: var(--ok); font-weight: 700; }
.bad-t { color: var(--bad); font-weight: 700; }
.muted { color: var(--muted); }
.form { display: grid; grid-template-columns: max-content 1fr; gap: 8px 12px; align-items: center; }
.form input[type=number] { width: 6em; }
.cats { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.codebox { font-size: 2rem; font-weight: 800; letter-spacing: 0.2em; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
@media (max-width: 480px) { .form { grid-template-columns: 1fr; } }
.grow { flex: 1; margin: 0; }
.full { width: 100%; }
.question.word { font-size: clamp(1.6rem, 7vw, 2.4rem); }
.prompt { color: var(--muted); margin: 0 0 6px; }
input.word { font-size: 1.6rem; width: 11em; max-width: 100%; text-align: center; }
.verdict.small { font-size: 1.5rem; }
button.list { display: block; width: 100%; margin: 10px 0; text-align: left; }
.dictation-text { text-align: left; white-space: pre-wrap; background: var(--bg); padding: 14px; border-radius: 12px; margin: 14px 0; line-height: 1.7; }
textarea { width: 100%; min-height: 8em; }
.boxes { font-variant-numeric: tabular-nums; }
button.mic { margin-top: 4px; }
.explain { margin: 12px auto; padding: 12px; border-radius: 12px; background: var(--card); max-width: 30em; text-align: left; }
.explain p { margin: 6px 0; }
.pron-good { color: var(--ok); font-weight: 700; }
.pron-close { color: var(--text); font-weight: 600; }
.pron-other { color: var(--bad); }