/* Гами — стилі. Кольори задано змінними; контраст тексту ≥ 4.5:1 в обох темах. */

:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --surface-2: #eef1f7;
  --border: #c5ccda;
  --text: #171c28;
  --muted: #4a5265;
  --primary: #1d4ed8;
  --primary-text: #ffffff;
  --primary-soft: #dfe8ff;
  --ok: #14602f;
  --ok-soft: #dcf5e4;
  --bad: #a61b1b;
  --bad-soft: #fde3e3;
  --warn: #8a3c0b;
  --warn-soft: #fdeed3;
  --focus: #b45309;
  --f-pinky: #fbdde1;
  --f-ring: #fdf0c4;
  --f-middle: #d3f3dd;
  --f-index: #d6e6ff;
  --f-thumb: #e4e6ee;
  --shadow: 0 1px 2px rgb(16 24 40 / 8%), 0 4px 14px rgb(16 24 40 / 6%);
  --exercise-size: 28px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e131d;
    --surface: #172030;
    --surface-2: #1f2a3e;
    --border: #44506a;
    --text: #e9edf5;
    --muted: #b3bccd;
    --primary: #9db9ff;
    --primary-text: #0b1220;
    --primary-soft: #24345a;
    --ok: #8fe3ac;
    --ok-soft: #173a26;
    --bad: #ffb0b0;
    --bad-soft: #4a1f24;
    --warn: #ffd08a;
    --warn-soft: #45310f;
    --focus: #ffd08a;
    --f-pinky: #56283a;
    --f-ring: #55471a;
    --f-middle: #1d4630;
    --f-index: #213c69;
    --f-thumb: #343c4e;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0e131d;
  --surface: #172030;
  --surface-2: #1f2a3e;
  --border: #44506a;
  --text: #e9edf5;
  --muted: #b3bccd;
  --primary: #9db9ff;
  --primary-text: #0b1220;
  --primary-soft: #24345a;
  --ok: #8fe3ac;
  --ok-soft: #173a26;
  --bad: #ffb0b0;
  --bad-soft: #4a1f24;
  --warn: #ffd08a;
  --warn-soft: #45310f;
  --focus: #ffd08a;
  --f-pinky: #56283a;
  --f-ring: #55471a;
  --f-middle: #1d4630;
  --f-index: #213c69;
  --f-thumb: #343c4e;
  --shadow: 0 1px 2px rgb(0 0 0 / 40%);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow-wrap: anywhere;
}

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }

h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.3rem; margin-top: 1.4em; }
h3 { font-size: 1.08rem; margin-top: 1em; }
p { margin: 0 0 .8em; }
a { color: var(--primary); text-underline-offset: 3px; }
ul, ol { padding-left: 1.3em; margin: 0 0 .8em; }
code, kbd, .mono { font-family: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas, monospace; }
kbd {
  display: inline-block; padding: 0 .4em; border: 1px solid var(--border); border-bottom-width: 2px;
  border-radius: 6px; background: var(--surface-2); font-size: .9em; white-space: nowrap;
}
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.loading { padding: 3rem 0; color: var(--muted); }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 6px; }
main:focus { outline: none; }

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 20; padding: 10px 14px;
  background: var(--primary); color: var(--primary-text); border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 12px; }

/* ---------- Шапка й навігація ---------- */

.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; padding-top: 10px; padding-bottom: 10px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; color: var(--text); text-decoration: none; }
.brand-mark {
  display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 9px;
  background: var(--primary); color: var(--primary-text); font-weight: 800;
}
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 6px; flex: 1; }
.nav a {
  padding: 7px 11px; border-radius: 8px; color: var(--text); text-decoration: none; font-weight: 600; font-size: .95rem;
  border: 1px solid transparent;
}
.nav a:hover { background: var(--surface-2); }
.nav a[aria-current="page"] { background: var(--primary-soft); border-color: var(--primary); }
.nav .spacer { flex: 1; }
.lang-switch { display: inline-flex; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; }
.lang-switch button {
  border: 0; border-radius: 0; background: var(--surface); color: var(--text); padding: 7px 12px; font-weight: 700; min-height: 0;
}
.lang-switch button[aria-pressed="true"] { background: var(--primary); color: var(--primary-text); }

main.wrap { padding-top: 28px; padding-bottom: 48px; min-height: 100vh; }
.site-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: .92rem; }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 24px; padding-top: 16px; padding-bottom: 16px; }
.footer-row p { margin: 0; }

/* ---------- Кнопки й форми ---------- */

button, .button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 9px 18px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
button:hover, .button:hover { background: var(--surface-2); }
button.primary, .button.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
button.primary:hover, .button.primary:hover { filter: brightness(1.08); background: var(--primary); }
button.danger { border-color: var(--bad); color: var(--bad); }
button:disabled { opacity: .55; cursor: not-allowed; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }

input[type="number"], input[type="range"], select {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 10px; min-height: 44px; max-width: 100%;
}
input[type="range"] { padding: 0; width: 220px; }
input[type="checkbox"], input[type="radio"] { width: 20px; height: 20px; accent-color: var(--primary); }
label { font-weight: 600; }
.field { display: grid; grid-template-columns: minmax(0, 1fr); gap: 4px; margin-bottom: 16px; }
select { width: 100%; max-width: 420px; }
.field .hint { font-weight: 400; color: var(--muted); font-size: .92rem; }
.check { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 14px; }
.check span { display: grid; }
fieldset { border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; margin: 0 0 18px; min-width: 0; }
legend { font-weight: 700; padding: 0 6px; }

/* ---------- Картки й сітки ---------- */

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 18px 20px; box-shadow: var(--shadow); margin-bottom: 18px; }
.card > :last-child { margin-bottom: 0; }
.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.hero { display: grid; gap: 6px; margin-bottom: 20px; }
.lead { font-size: 1.1rem; color: var(--muted); max-width: 70ch; }

.badge {
  display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px; border-radius: 999px;
  font-size: .82rem; font-weight: 700; border: 1px solid var(--border); background: var(--surface-2); white-space: nowrap;
}
.badge.ok { background: var(--ok-soft); color: var(--ok); border-color: var(--ok); }
.badge.bad { background: var(--bad-soft); color: var(--bad); border-color: var(--bad); }
.badge.warn { background: var(--warn-soft); color: var(--warn); border-color: var(--warn); }
.badge.stage { background: var(--primary-soft); border-color: var(--primary); }

.notice { border-left: 5px solid var(--primary); background: var(--primary-soft); padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; }
.notice.ok { border-color: var(--ok); background: var(--ok-soft); }
.notice.bad { border-color: var(--bad); background: var(--bad-soft); }
.notice.warn { border-color: var(--warn); background: var(--warn-soft); }
.notice > :last-child { margin-bottom: 0; }

.progress-bar { height: 12px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.progress-bar > span { display: block; height: 100%; background: var(--primary); }

/* ---------- Списки вправ ---------- */

.lesson { margin-bottom: 14px; }
.lesson-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; margin-bottom: 8px; }
.lesson-head h2, .lesson-head h3 { margin: 0; font-size: 1.1rem; }
.ex-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.ex-item { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.ex-item a { font-weight: 600; }
.ex-item .ex-state { margin-left: auto; display: inline-flex; gap: 8px; align-items: center; }
.ex-item.locked { color: var(--muted); background: var(--surface-2); }
.keys { display: inline-flex; flex-wrap: wrap; gap: 4px; }
.keycap {
  display: inline-grid; place-items: center; min-width: 30px; height: 30px; padding: 0 7px;
  border: 1px solid var(--border); border-bottom-width: 3px; border-radius: 7px; background: var(--surface);
  font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace; font-weight: 700;
}

/* ---------- Тренувальний екран ---------- */

.trainer-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 10px; }
.trainer-head h1 { margin: 0; font-size: 1.45rem; }

.type-panel {
  position: relative; background: var(--surface); border: 2px solid var(--border); border-radius: 14px;
  padding: 26px 24px; margin: 14px 0; box-shadow: var(--shadow);
}
.type-panel:focus-within { border-color: var(--focus); outline: 3px solid var(--focus); outline-offset: 2px; }
.type-text {
  font-family: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas, monospace;
  font-size: var(--exercise-size); line-height: 1.75; white-space: pre-wrap; word-break: normal; overflow-wrap: break-word;
  margin: 0; letter-spacing: .02em;
}
.type-text .ch { border-radius: 4px; padding: 1px 0; border-bottom: 3px solid transparent; }
.type-text .ch.correct { color: var(--muted); }
.type-text .ch.fixed { color: var(--warn); border-bottom: 3px dotted var(--warn); }
.type-text .ch.wrong { color: var(--bad); background: var(--bad-soft); border-bottom: 3px double var(--bad); }
.type-text .ch.current { background: var(--primary-soft); box-shadow: 0 0 0 2px var(--primary); }
.type-text .ch.current.error { background: var(--bad-soft); box-shadow: 0 0 0 2px var(--bad); border-bottom: 3px double var(--bad); }
.capture {
  position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; resize: none; border: 0; padding: 0; margin: 0;
  font-size: 16px; cursor: text; background: transparent; color: transparent; caret-color: transparent;
}
.resume-hint { display: none; margin: 10px 0 0; font-weight: 600; color: var(--warn); }
.type-panel:not(:focus-within) .resume-hint { display: block; }
.type-status { min-height: 1.6em; margin: 0 0 6px; font-weight: 600; }
.type-status.error { color: var(--bad); }
.type-status.warn { color: var(--warn); }
.type-meta { display: flex; flex-wrap: wrap; gap: 6px 20px; color: var(--muted); font-size: .95rem; }

@keyframes nudge { 0%, 100% { transform: translateX(0); } 30% { transform: translateX(-4px); } 70% { transform: translateX(4px); } }
.type-panel.shake { animation: nudge .16s linear; }

/* ---------- Клавіатура ---------- */

.keyboard { display: grid; gap: 5px; margin: 12px 0; max-width: 780px; }
.kb-row { display: grid; grid-template-columns: repeat(30, 1fr); gap: 5px; }
.kb-key {
  grid-column: span 2; display: grid; place-items: center; min-height: 40px; border-radius: 7px;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace; font-weight: 700; font-size: 1rem; position: relative;
}
.kb-key.wide { font-size: .68rem; font-weight: 600; color: var(--muted); font-family: inherit; }
.kb-key.f-L5, .kb-key.f-R5 { background: var(--f-pinky); }
.kb-key.f-L4, .kb-key.f-R4 { background: var(--f-ring); }
.kb-key.f-L3, .kb-key.f-R3 { background: var(--f-middle); }
.kb-key.f-L2, .kb-key.f-R2 { background: var(--f-index); }
.kb-key.f-T { background: var(--f-thumb); }
.kb-key.home { border-width: 2px; border-color: var(--text); }
.kb-key.bump::after { content: ""; position: absolute; bottom: 4px; width: 12px; height: 3px; border-radius: 2px; background: var(--text); }
.kb-key.dim { background: var(--surface-2); color: var(--muted); border-style: dashed; font-weight: 400; }
.kb-key.focus { outline: 3px solid var(--primary); outline-offset: 1px; }
.kb-key.next { outline: 4px solid var(--focus); outline-offset: 1px; transform: translateY(-2px); }
.kb-key .heat { position: absolute; top: 1px; right: 3px; font-size: .62rem; font-weight: 700; color: var(--bad); font-family: inherit; }
.kb-key.hot1 { box-shadow: inset 0 -5px 0 var(--warn); }
.kb-key.hot2 { box-shadow: inset 0 -9px 0 var(--bad); }
.legend { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: .9rem; margin: 6px 0 12px; padding: 0; list-style: none; }
.legend li { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 18px; height: 18px; border-radius: 5px; border: 1px solid var(--border); display: inline-block; }
.swatch.pinky { background: var(--f-pinky); } .swatch.ring { background: var(--f-ring); }
.swatch.middle { background: var(--f-middle); } .swatch.index { background: var(--f-index); } .swatch.thumb { background: var(--f-thumb); }

/* ---------- Результат і статистика ---------- */

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 14px 0; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.tile .label { font-size: .86rem; color: var(--muted); font-weight: 600; }
.tile .value { font-size: 1.7rem; font-weight: 800; line-height: 1.2; }
.tile .sub { font-size: .86rem; color: var(--muted); }

table { border-collapse: collapse; width: 100%; margin: 0 0 14px; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .9rem; color: var(--muted); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table-scroll { overflow-x: auto; }
caption { text-align: left; font-weight: 700; padding-bottom: 6px; }

.chart { width: 100%; height: auto; display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; }
.chart .axis { stroke: var(--border); stroke-width: 1; }
.chart .bar { fill: var(--primary); }
.chart .bar.err { fill: var(--bad); }
.chart .line { fill: none; stroke: var(--primary); stroke-width: 2.5; }
.chart .line.acc { stroke: var(--ok); stroke-dasharray: 6 4; }
.chart .dot { fill: var(--primary); }
.chart text { fill: var(--muted); font-size: 11px; font-family: inherit; }

.steps { list-style: none; padding: 0; margin: 0 0 14px; display: grid; gap: 8px; counter-reset: step; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 34px 1fr; gap: 10px; align-items: start; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.steps li::before { content: counter(step); display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--border); font-weight: 700; }
.steps li.current { border-color: var(--primary); border-width: 2px; }
.steps li.done::before { content: "✓"; background: var(--ok-soft); color: var(--ok); border-color: var(--ok); }

.choice { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin: 12px 0 18px; }
.choice button { flex-direction: column; align-items: flex-start; text-align: left; padding: 14px 16px; height: 100%; }
.choice button strong { font-size: 1.05rem; }
.choice button span { font-weight: 400; color: var(--muted); }
.choice button.primary span { color: var(--primary-text); }

@media (max-width: 720px) {
  body { font-size: 16px; }
  .header-row { gap: 6px 12px; }
  .nav { flex-basis: 100%; gap: 2px 4px; }
  .nav a { padding: 6px 8px; font-size: .9rem; }
  .nav .spacer { display: none; }
  .lang-switch { margin-left: auto; }
  .wrap { padding: 0 14px; }
  h1 { font-size: 1.45rem; }
  .type-panel { padding: 18px 14px; }
  .type-text { font-size: min(var(--exercise-size), 24px); }
  .kb-row { gap: 3px; }
  .keyboard { gap: 3px; }
  .kb-key { min-height: 30px; font-size: .78rem; border-radius: 5px; }
  .kb-key.wide { font-size: 0; }
  .ex-item .ex-state { margin-left: 0; }
  input[type="range"] { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
:root[data-motion="off"] *, :root[data-motion="off"] *::before, :root[data-motion="off"] *::after {
  animation: none !important; transition: none !important; scroll-behavior: auto !important;
}