:root {
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --ink: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --good: #3fb950;
  --bad: #f85149;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
}

.app {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 24px 16px 40px;
}

h1 {
  margin: 0 0 16px;
  font-size: 2rem;
}

.langs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0 0 16px;
  padding: 8px 12px 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.langs legend {
  padding: 0 4px;
  color: var(--muted);
  font-size: 0.85rem;
}

.langs label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.langs input {
  accent-color: var(--accent);
  width: 1.1em;
  height: 1.1em;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0 0 16px;
  text-align: center;
}

.stats div {
  padding: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.stats dt {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stats dd {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.passage {
  margin: 0;
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--muted);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.passage:lang(ar),
.input:lang(ar) {
  font-family: "Segoe UI", Tahoma, "Geeza Pro", "Noto Naskh Arabic", "Noto Sans Arabic", sans-serif;
  font-size: 1.4rem;
  line-height: 2;
}

.passage .correct {
  color: var(--good);
}

.passage .incorrect {
  color: var(--bad);
  background: rgba(248, 81, 73, 0.15);
  text-decoration: underline wavy;
}

.passage .current {
  color: var(--ink);
  background: rgba(88, 166, 255, 0.25);
  border-bottom: 2px solid var(--accent);
  animation: blink 1s steps(2, jump-none) infinite;
}

@keyframes blink {
  50% {
    border-bottom-color: transparent;
  }
}

.legend {
  margin: 8px 0 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.input-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
}

.input {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  font-size: 1.1rem;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  resize: vertical;
}

.input:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.status {
  min-height: 1.5em;
  margin: 12px 0 0;
  font-weight: 600;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

button {
  font: inherit;
  font-weight: 600;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

@media (max-width: 400px) {
  .app {
    padding: 16px 12px 32px;
  }

  h1 {
    font-size: 1.6rem;
  }

  .stats dd {
    font-size: 1.25rem;
  }

  .passage {
    padding: 12px;
    font-size: 1.05rem;
  }

  .passage:lang(ar),
  .input:lang(ar) {
    font-size: 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .passage .current {
    animation: none;
  }
}