:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --border: #e2e2e2;
  --correct: #1f8a4c;
  --correct-bg: #e6f6ec;
  --wrong: #c0392b;
  --wrong-bg: #fce9e7;
  --accent: #4a4a2f;
  --accent-soft: #ececdf;
  --brand: #4a4a2f;
  --btn-bg: #f4f5f7;
  --bg2: #ffffff;
  font-size: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #f0f0f0;
    --muted: #a0a0a0;
    --border: #333333;
    --correct: #4caf6f;
    --correct-bg: #163823;
    --wrong: #e06c5e;
    --wrong-bg: #3a1f1c;
    --accent: #c2bf7e;
    --accent-soft: #2e2e1c;
    --btn-bg: #1e1e1e;
    --bg2: #171717;
  }
}

/* Inter, uložené přímo v appce (fonts/) - nic se netahá z internetu,
   funguje i offline. Dva soubory pokrývají základní i český rozšířený
   znakový rozsah (háčky a čárky), prohlížeč si sám vybere ten, co
   zrovna potřebuje. Jde o proměnný řez (jeden soubor = váhy 400-800). */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("fonts/inter-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+2020, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

#app {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

#question-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  padding: 0 0 16px 0;
}

#loading {
  padding: 24px;
  color: var(--muted);
  text-align: center;
}

.meta {
  padding: 10px 16px 0 16px;
  font-size: 0.75rem;
  color: var(--muted);
}

.question-text {
  padding: 8px 16px 12px 16px;
  font-size: 1.15rem;
  line-height: 1.4;
  font-weight: 600;
}

.image-wrap {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 16px 12px 16px;
  -webkit-overflow-scrolling: touch;
}

.image-wrap img {
  max-height: 240px;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: zoom-in;
  flex-shrink: 0;
}

.image-wrap.single img {
  max-height: 280px;
  width: auto;
  margin: 0 auto;
}

.image-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 0 16px 12px 16px;
}

.image-dots .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border);
}

.image-dots .dot.active {
  background: var(--accent);
}

.spacer {
  flex: 1;
}

@media (min-width: 600px) {
  /* Na telefonu má tenhle prostor roztáhnout odpovědi až úplně dolů
     (dosah palce). Na širší obrazovce k tomu není důvod a jen by to
     natáhlo obří prázdnou mezeru - tam ať zůstane rozumně malá. */
  .spacer {
    flex: none;
    height: 32px;
  }
}

#answers {
  padding: 8px 16px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.answer-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  font-size: 1rem;
  line-height: 1.35;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--btn-bg);
  color: var(--fg);
  font-family: inherit;
  cursor: pointer;
}

.answer-btn:active {
  opacity: 0.8;
}

.answer-btn.correct {
  border-color: var(--correct);
  background: var(--correct-bg);
  color: var(--correct);
  font-weight: 600;
}

.answer-btn.wrong {
  border-color: var(--wrong);
  background: var(--wrong-bg);
  color: var(--wrong);
  font-weight: 600;
}

.answer-btn:disabled {
  cursor: default;
}

.answer-btn .letter {
  display: inline-block;
  width: 1.4em;
  font-weight: 700;
  color: var(--muted);
}

.answer-btn.correct .letter,
.answer-btn.wrong .letter {
  color: inherit;
}

#result-panel {
  margin: 4px 16px 12px 16px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--btn-bg);
}

.result-title {
  font-weight: 700;
  margin-bottom: 6px;
}

#result-panel.correct .result-title { color: var(--correct); }
#result-panel.wrong .result-title { color: var(--wrong); }

.explanation-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--muted);
  margin: 0 0 4px 0;
}

.result-title + .explanation-label {
  margin-top: 10px;
}

.explanation {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--fg);
}

#next-btn {
  display: block;
  width: calc(100% - 32px);
  margin: 4px 16px 12px 16px;
  padding: 14px 16px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 12px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  cursor: pointer;
}

#next-btn:active {
  opacity: 0.85;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.back-link {
  display: block;
  max-width: 640px;
  margin: 0 auto;
  padding: 14px 16px 0 16px;
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
}

.varka-shrnuti {
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  padding: 64px 20px;
  text-align: center;
}

.varka-skore {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.varka-text {
  color: var(--muted);
  margin: 0 0 28px 0;
}

.varka-btn {
  display: block;
  width: 100%;
  padding: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: 12px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  cursor: pointer;
}

.varka-btn:active {
  opacity: 0.85;
}

#lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.97);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

#lightbox img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 4px;
}