:root {
  --bg: #f3f7fb;
  --bg-strong: #e8f0f8;
  --surface: #ffffff;
  --surface-muted: #f8fbff;
  --text: #122033;
  --muted: #5f6f85;
  --accent: #1f6feb;
  --accent-strong: #0f4db8;
  --success: #0d9960;
  --error: #c83a4c;
  --border: #d8e1eb;
  --shadow: 0 10px 26px rgba(17, 38, 68, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 10% 10%, #e3eefb 0%, transparent 40%),
    linear-gradient(165deg, var(--bg) 0%, var(--bg-strong) 100%);
  color: var(--text);
}

.app {
  width: min(1040px, 100% - 2rem);
  margin: 2rem auto 3rem;
  display: grid;
  gap: 1rem;
}

.hero {
  padding: 0.5rem 0 0.75rem;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--accent);
}

h1 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  line-height: 1.15;
}

.subtle {
  margin: 0.55rem 0 0;
  color: var(--muted);
  max-width: 68ch;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.controls {
  padding: 0.9rem;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 0.8rem;
  align-items: center;
}

.mode-picker {
  display: inline-flex;
  border-radius: 11px;
  padding: 0.2rem;
  background: var(--surface-muted);
  border: 1px solid var(--border);
}

.mode-button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0.55rem 0.95rem;
  border-radius: 9px;
  font-weight: 600;
  cursor: pointer;
  transition: background 150ms ease;
}

.mode-button:hover,
.mode-button:focus-visible {
  background: #e8f2ff;
  color: var(--text);
  outline: none;
}

.mode-button.is-active {
  background: var(--accent);
  color: #fff;
}

.duration-control {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.92rem;
  color: var(--muted);
}

select {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 9px;
  padding: 0.45rem 0.5rem;
  font: inherit;
}

.control-actions {
  display: inline-flex;
  gap: 0.5rem;
}

button {
  font: inherit;
}

.primary-btn,
.secondary-btn {
  border-radius: 10px;
  padding: 0.52rem 0.9rem;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
}

.primary-btn {
  background: var(--accent);
  color: #fff;
}

.primary-btn:hover,
.primary-btn:focus-visible {
  background: var(--accent-strong);
  outline: none;
}

.secondary-btn {
  background: #fff;
  border-color: var(--border);
  color: var(--text);
}

.secondary-btn:hover,
.secondary-btn:focus-visible {
  background: #f2f7ff;
  outline: none;
}

.primary-btn:disabled,
.secondary-btn:disabled,
select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
}

.stat {
  padding: 0.9rem;
}

.label {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.value {
  margin: 0.24rem 0 0;
  font-size: 1.55rem;
  font-weight: 700;
}

.practice {
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
}

.practice-top {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: center;
  flex-wrap: wrap;
}

.mode-description,
.best-result {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.best-result strong {
  color: var(--text);
}

.time-progress {
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: #e6edf6;
  overflow: hidden;
}

#time-progress-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #57a2ff 0%, var(--accent) 100%);
  transition: width 180ms linear;
}

.text-display {
  margin: 0;
  min-height: 7.8rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem;
  background: #f9fbff;
  line-height: 1.8;
  letter-spacing: 0.01em;
  font-size: 1.06rem;
}

.char {
  border-radius: 3px;
}

.char.correct {
  color: var(--success);
}

.char.incorrect {
  color: var(--error);
  background: #feeef1;
}

.char.current {
  background: #dbe9ff;
  border-bottom: 2px solid var(--accent);
}

.char.pending {
  color: #6b7b92;
}

.input-label {
  font-size: 0.89rem;
  color: var(--muted);
}

.typing-input {
  width: 100%;
  border-radius: 11px;
  border: 1px solid var(--border);
  padding: 0.72rem 0.82rem;
  font-size: 1.02rem;
  color: var(--text);
}

.typing-input:focus-visible {
  outline: 2px solid #abd0ff;
  border-color: #9bbff7;
}

.feedback-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.finger-hint,
.live-feedback {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.live-feedback {
  color: var(--text);
  font-weight: 600;
}

.summary {
  padding: 1rem;
}

.summary h2 {
  margin-top: 0;
  margin-bottom: 0.8rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem 1rem;
  margin-bottom: 0.8rem;
}

.summary-grid p {
  margin: 0;
  color: var(--muted);
}

.summary-grid strong {
  color: var(--text);
}

.summary-feedback {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.35rem;
  color: var(--text);
}

.hidden {
  display: none;
}

@media (max-width: 860px) {
  .controls {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .app {
    width: calc(100% - 1rem);
    margin: 1rem auto 1.75rem;
  }

  .stats-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .practice-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .control-actions {
    width: 100%;
  }

  .primary-btn,
  .secondary-btn {
    flex: 1 1 auto;
  }

  .text-display {
    min-height: 9.5rem;
  }
}