:root {
  --bg: #f7f8fa;
  --text: #0f172a;
  --muted: #475569;
  --card: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
  --accent: #3b82f6;
  --wpm-color: #10b981;
  --cpm-color: #8b5cf6;
  --accuracy-color: #60a5fa;
  --errors-color: #ef4444;
}


[data-theme="dark"] {
  --bg: #0b1220;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --card: #0f172a;
  --border: #1f2937;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
  --accent: #60a5fa;
  --wpm-color: #34d399;
  --cpm-color: #a78bfa;
  --accuracy-color: #93c5fd;
  --errors-color: #f87171;
}

/* Dark mode */
[data-theme="dark"] .card { background: var(--card) }
[data-theme="dark"] .card img { background: #0b1220 }
[data-theme="dark"] .btn-outline { background: transparent }


[data-theme="dark"] input,
[data-theme="dark"] textarea,
[data-theme="dark"] select {
  background: #111;
  color: var(--text);
  border-color: var(--border);
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
  color: #9ca3af;
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus,
[data-theme="dark"] select:focus {
  outline: none;
  box-shadow: 0 0 0 2px rgba(255,255,255,.08);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-header {
  max-width: 1000px;
  margin: 24px auto 0;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

/* Theme Switch */
.switch {
  font-size: 17px;
  position: relative;
  display: inline-block;
  width: 4em;
  height: 2.2em;
  border-radius: 30px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #2a2a2a;
  transition: 0.4s;
  border-radius: 30px;
  overflow: hidden;
}

.slider:before {
  position: absolute;
  content: "";
  height: 1.2em;
  width: 1.2em;
  border-radius: 20px;
  left: 0.5em;
  bottom: 0.5em;
  transition: 0.4s;
  transition-timing-function: cubic-bezier(0.81, -0.04, 0.38, 1.5);
  box-shadow: inset 8px -4px 0px 0px #fff;
}

.switch input:checked + .slider {
  background-color: #00a6ff;
}

.switch input:checked + .slider:before {
  transform: translateX(1.8em);
  box-shadow: inset 15px -4px 0px 15px #ffcf48;
}

.star {
  background-color: #fff;
  border-radius: 50%;
  position: absolute;
  width: 5px;
  transition: all 0.4s;
  height: 5px;
}

.star_1 {
  left: 2.5em;
  top: 0.5em;
}

.star_2 {
  left: 2.2em;
  top: 1.2em;
}

.star_3 {
  left: 3em;
  top: 0.9em;
}

.switch input:checked ~ .slider .star {
  opacity: 0;
}

.cloud {
  width: 3.5em;
  position: absolute;
  bottom: -1.4em;
  left: -1.1em;
  opacity: 0;
  transition: all 0.4s;
}

.switch input:checked ~ .slider .cloud {
  opacity: 1;
}

.container {
  max-width: 1000px;
  margin: 20px auto;
  padding: 0 16px 40px;
}

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

.prompt-card {
  margin-bottom: 16px;
}

.typing-card {
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

/* Progress bar above typing area */
.progress {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin: 8px 0 12px;
}
.progress-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--wpm-color));
  transition: width 200ms ease;
}

.card-title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.timer {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--accent);
  font-size: 1.1rem;
}

.prompt-text {
  margin: 0;
  line-height: 1.7;
  font-size: 16px;
  color: var(--muted);
}

.controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
}

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.typing-area {
  width: 100%;
  resize: vertical;
  min-height: 120px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  font-size: 16px;
  line-height: 1.6;
  color: transparent;
  -webkit-text-fill-color: transparent;
  caret-color: var(--text);
}

/* Keep textarea text hidden even when user selects it (AI IN THIS ONE) */
.typing-area::selection {
  color: transparent;
  background: rgba(0, 0, 0, 0.12);
}
.typing-area::-moz-selection {
  color: transparent;
  background: rgba(0, 0, 0, 0.12);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.stat {
  padding: 14px;
}

.stat-label {
  font-size: 12px;
  color: var(--muted);
}

.stat-value {
  margin-top: 6px;
  font-size: 22px;
  font-weight: 700;
}
#wpm { color: var(--wpm-color); }
#cpm { color: var(--cpm-color); }
#accuracy { color: var(--accuracy-color); }
#errors { color: var(--errors-color); }

.result {
  margin-top: 24px;
}

.result-title {
  margin: 0 0 10px;
  font-size: 16px;
}

.result-chips {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.chip {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.chip-label {
  font-size: 12px;
  color: var(--muted);
}
.chip-value {
  margin-top: 6px;
  font-size: 22px;
  font-weight: 700;
}
.chip.wpm .chip-value { color: var(--wpm-color); }
.chip.cpm .chip-value { color: var(--cpm-color); }
.chip.accuracy .chip-value { color: var(--accuracy-color); }
.chip.errors .chip-value { color: var(--errors-color); }

.hidden {
  display: none;
}

.app-footer {
  max-width: 1000px;
  margin: 0 auto 32px;
  padding: 0 16px;
  color: var(--muted);
  font-size: 14px;
}

.guide-banner {
  max-width: 1000px;
  margin: 16px auto 0;
  padding: 8px 16px;
  color: var(--muted);
  font-size: 14px;
}

.metrics p {
  margin: 6px 0;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 768px) {
  .result-chips { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 420px) {
  .result-chips { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .typing-area {
    min-height: 100px;
  }
}

@media (max-width: 420px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .btn {
    padding: 8px 12px;
  }
}
.typing-container {
  position: relative;
  font-family: monospace;
}

.typing-overlay {
  position: absolute;
  inset: 0;
  padding: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 16px;
  line-height: 1.6;
  color: var(--muted);
  pointer-events: none;
}

.typing-overlay .correct { color: #10b981; }
.typing-overlay .wrong { color: #ef4444; }
.typing-overlay .remaining { color: var(--muted); }
.metrics {
  margin-top: 24px;
}

/* Progress cirvle for accuracy */
.circle {
  position: relative;
}
.circle.progress {
  --progress-deg: 0deg;
  --ring-color: var(--accent);
  --track-color: var(--border);
  background: conic-gradient(var(--ring-color) var(--progress-deg), var(--track-color) 0);
}
.circle.progress::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--card);
}
.circle.progress .value,
.circle.progress .label {
  position: relative;
  z-index: 1;
}
.circle.accuracy {
  --ring-color: var(--accuracy-color);
}