/* Typing Speed Tester - Web UI Styles */
:root {
  --bg: #0f172a;          /* slate-900 */
  --card: #111827;        /* gray-900 */
  --muted: #94a3b8;       /* slate-400 */
  --text: #e5e7eb;        /* gray-200 */
  --primary: #22d3ee;     /* cyan-400 */
  --accent: #a78bfa;      /* violet-400 */
  --success: #34d399;     /* green-400 */
  --warn: #fbbf24;        /* amber-400 */
  --danger: #f87171;      /* red-400 */
  --progress: #38bdf8;    /* sky-400 */
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1000px 600px at 10% 10%, #1e293b 0%, transparent 60%),
              radial-gradient(900px 500px at 90% 20%, #111827 0%, transparent 60%),
              radial-gradient(800px 600px at 50% 100%, #0b1220 0%, var(--bg) 60%);
}

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

.title {
  text-align: center;
  font-weight: 800;
  letter-spacing: 0.4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 10px 0 24px 0;
  font-size: 2.1rem;
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(6px);
  padding: 22px 22px 16px 22px;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.sentence {
  min-height: 80px;
  line-height: 1.6;
  font-size: 1.1rem;
  color: #e2e8f0; /* slate-200 */
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(148, 163, 184, 0.08);
  border: 1px dashed rgba(148, 163, 184, 0.25);
}

.controls {
  display: flex;
  gap: 10px;
  margin: 14px 0 10px 0;
}

.btn {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}
.btn:hover { transform: translateY(-1px); background: rgba(255,255,255,0.09); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn.primary {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-color: transparent;
  color: #0b1020;
  font-weight: 700;
}

.btn.ghost { background: rgba(255,255,255,0.04); }

.input {
  width: 100%;
  resize: vertical;
  min-height: 76px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(2, 6, 23, 0.45);
  color: var(--text);
  border-radius: 12px;
  padding: 12px 14px;
  outline: none;
  font-size: 1.05rem;
}
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15); }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 12px;
}
.stat {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 12px;
  padding: 12px;
  text-align: center;
}
.value {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.3px;
}
.label {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 4px;
}

.value.good { color: var(--success); }
.value.ok { color: var(--warn); }
.value.bad { color: var(--danger); }

.progress {
  margin-top: 10px;
  height: 10px;
  background: rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.25);
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--progress), var(--primary));
  transition: width 120ms ease;
}

.feedback {
  margin-top: 12px;
  font-weight: 600;
}

/* Per-character highlighting */
.char { opacity: 0.6; }
.char.correct { color: var(--success); opacity: 1; }
.char.incorrect { color: var(--danger); opacity: 1; text-decoration: underline wavy rgba(248,113,113,0.4); }
.char.current { color: var(--primary); opacity: 1; text-decoration: underline dotted rgba(34,211,238,0.5); }

.tip {
  color: var(--muted);
  text-align: center;
  margin-top: 14px;
}