:root {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --page-plane: #f9f9f7;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;
  --series-3: #1baf7a;
  --status-good: #0ca30c;
  --status-critical: #d03b3b;
  --card-bg: #ffffff;
  --key-bg: #ffffff;
  --key-border: #d8d7d0;
  --key-active: #2a78d6;
  --key-active-text: #ffffff;

  --finger-lp: #2a78d6;
  --finger-lr: #eb6834;
  --finger-lm: #1baf7a;
  --finger-li: #eda100;
  --finger-ri: #e87ba4;
  --finger-rm: #008300;
  --finger-rr: #4a3aa7;
  --finger-rp: #e34948;
  --finger-thumb: #898781;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --page-plane: #0d0d0d;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --series-3: #199e70;
    --status-good: #0ca30c;
    --status-critical: #e66767;
    --card-bg: #232322;
    --key-bg: #2b2b2a;
    --key-border: #3c3c3a;
    --key-active: #3987e5;
    --key-active-text: #ffffff;

    --finger-lp: #3987e5;
    --finger-lr: #d95926;
    --finger-lm: #199e70;
    --finger-li: #c98500;
    --finger-ri: #d55181;
    --finger-rm: #008300;
    --finger-rr: #9085e9;
    --finger-rp: #e66767;
    --finger-thumb: #898781;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  background: var(--page-plane);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(16px, 4vw, 40px);
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  font-size: 1.25rem;
  margin: 0;
}

.profile-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

#profile-name {
  font-weight: 600;
  color: var(--text-primary);
}

main#app {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 40px) 60px;
}

.screen h2 { margin-top: 0; }

.screen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.muted { color: var(--text-secondary); }
.muted.small { font-size: 0.85rem; color: var(--text-muted); }

button {
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  border-radius: 8px;
  border: none;
  padding: 10px 18px;
  background: var(--series-1);
  color: #fff;
  transition: opacity 0.15s ease;
}
button:hover { opacity: 0.88; }
button:active { opacity: 0.75; }

.secondary-btn {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.link-btn {
  background: none;
  border: none;
  color: var(--series-1);
  padding: 4px 0;
  text-decoration: underline;
}
.link-btn:hover { opacity: 0.75; }

.error-text { color: var(--status-critical); }

/* Profile screen */
.profile-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0;
}
.profile-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card-bg);
}
.profile-chip button.select-profile {
  background: none;
  color: var(--text-primary);
  padding: 0;
  font-weight: 600;
}
.profile-chip .delete-profile {
  background: none;
  color: var(--text-muted);
  padding: 0;
  font-size: 0.85rem;
}
.profile-chip .delete-profile:hover { color: var(--status-critical); }

.inline-form {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.inline-form input {
  flex: 1;
  min-width: 180px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--key-border);
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.95rem;
}

/* Lesson grid */
.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.lesson-card {
  padding: 16px;
  border-radius: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.lesson-card.locked {
  opacity: 0.5;
}
.lesson-card h3 {
  margin: 0;
  font-size: 1rem;
}
.lesson-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.lesson-card .lesson-best {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.lesson-card button {
  margin-top: auto;
}

/* Practice screen */
.live-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 16px;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 90px;
}
.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.text-display {
  font-size: 1.4rem;
  line-height: 2.1;
  letter-spacing: 0.5px;
  padding: 20px;
  border-radius: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  font-family: "Cascadia Code", "Consolas", monospace;
  min-height: 5.5em;
  cursor: text;
  white-space: normal;
  overflow-wrap: break-word;
}
.text-display span.char-pending { color: var(--text-muted); }
.text-display span.char-correct { color: var(--status-good); }
.text-display span.char-incorrect {
  color: var(--status-critical);
  text-decoration: underline;
  background: rgba(208, 59, 59, 0.12);
}
.text-display span.char-current {
  border-bottom: 2px solid var(--series-1);
}

.typing-input {
  position: absolute;
  opacity: 0;
  height: 1px;
  width: 1px;
  pointer-events: none;
}

/* On-screen keyboard */
.keyboard {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}
.kb-row {
  display: flex;
  gap: 6px;
}
.kb-key {
  min-width: 38px;
  height: 38px;
  border-radius: 6px;
  border: 1px solid var(--key-border);
  background: var(--key-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-family: monospace;
  color: var(--text-secondary);
  transition: background 0.1s ease, box-shadow 0.1s ease;
}
.kb-key[style*="--finger-color"] {
  background: color-mix(in srgb, var(--finger-color) 16%, var(--key-bg));
  border-color: color-mix(in srgb, var(--finger-color) 45%, var(--key-border));
}
.kb-key.kb-space { min-width: 220px; }
.kb-key.kb-target {
  background: var(--finger-color, var(--key-active)) !important;
  color: #fff;
  border-color: var(--finger-color, var(--key-active));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--finger-color, var(--key-active)) 35%, transparent);
}
.kb-key.kb-shift {
  min-width: 70px;
  font-size: 0.7rem;
}

.finger-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 14px;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.finger-legend .legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.finger-legend .legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 3px;
}

/* Result screen */
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.result-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.result-value {
  font-size: 1.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.result-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}
.result-message {
  font-size: 1rem;
  color: var(--text-secondary);
}
.button-row {
  display: flex;
  gap: 12px;
  margin: 16px 0;
  flex-wrap: wrap;
}

/* Stats screen */
.charts-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.chart-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.chart-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}
.chart-card-header h3 {
  margin: 0 0 4px;
  font-size: 0.95rem;
}
.chart-container { width: 100%; overflow-x: auto; }
.chart-container svg { display: block; }
.chart-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.chart-table th, .chart-table td {
  text-align: left;
  padding: 6px 10px;
  border-bottom: 1px solid var(--gridline);
  font-variant-numeric: tabular-nums;
}
.chart-empty { color: var(--text-muted); font-size: 0.9rem; padding: 20px 0; }

.weak-keys-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.weak-keys-card h3 { margin-top: 0; }
.weak-keys-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.weak-key-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--page-plane);
  border: 1px solid var(--border);
  font-family: monospace;
  font-size: 0.9rem;
}
.weak-key-chip .count {
  color: var(--status-critical);
  font-weight: 700;
}

/* Chart internals */
.viz-line { fill: none; stroke: var(--series-1); stroke-width: 2; stroke-linecap: round; }
.viz-dot { fill: var(--series-1); }
.viz-grid { stroke: var(--gridline); stroke-width: 1; }
.viz-axis { stroke: var(--baseline); stroke-width: 1; }
.viz-axis-label { fill: var(--text-muted); font-size: 11px; font-family: system-ui, sans-serif; }
.viz-crosshair { stroke: var(--baseline); stroke-width: 1; stroke-dasharray: 3 3; }
.viz-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--text-primary);
  color: var(--surface-1);
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 6px;
  transform: translate(-50%, -130%);
  white-space: nowrap;
}

[hidden] { display: none !important; }

@media (max-width: 480px) {
  .text-display { font-size: 1.1rem; padding: 14px; }
  .kb-key { min-width: 26px; height: 30px; font-size: 0.7rem; }
  .kb-key.kb-space { min-width: 120px; }
  .kb-key.kb-shift { min-width: 44px; }
  .live-stats { gap: 14px; }
}