/* ============================================================
   TypeForge — style.css
   Sections:
   1. CSS Variables & Reset
   2. Base / Layout
   3. Navigation Tabs
   4. Stats Bar
   5. Settings Row
   6. Hand Animation SVGs
   7. Finger Legend & Key Hint
   8. Typing Box
   9. On-Screen Keyboard
   10. Controls & Buttons
   11. Results Panel
   12. Lessons Tab
   13. Heatmap Tab
   14. Notification Toast
   15. Animations
============================================================ */


/* ── 1. CSS Variables & Reset ─────────────────────────────── */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Surfaces */
  --bg:      #0d0d0f;
  --surface: #161618;
  --card:    #1e1e22;
  --border:  #2a2a30;

  /* Text */
  --text:    #e8e8ec;
  --muted:   #6b6b7a;

  /* Accent palette */
  --accent:  #7c6af7;
  --accent2: #5cb8b2;
  --green:   #4ade80;
  --red:     #f87171;
  --yellow:  #fbbf24;

  /* Typing feedback */
  --correct: #4ade80;
  --wrong:   #f87171;
  --cursor:  #7c6af7;

  /* Finger colors */
  --f-pinky:  #a855f7;
  --f-ring:   #06b6d4;
  --f-middle: #f59e0b;
  --f-index:  #22c55e;
  --f-thumb:  #f87171;
}


/* ── 2. Base / Layout ─────────────────────────────────────── */

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 12px 48px;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 960px;
}

h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1.5px;
  text-align: center;
  margin-bottom: 6px;
  /* Gradient text */
  background: linear-gradient(135deg, #7c6af7 0%, #5cb8b2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
  text-align: center;
  margin-bottom: 24px;
}

.tab-intro {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
}

.status-msg {
  font-size: 12px;
  color: var(--muted);
}


/* ── 3. Navigation Tabs ───────────────────────────────────── */

.tabs {
  display: flex;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 20px;
}

.tab {
  flex: 1;
  padding: 9px 8px;
  text-align: center;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  font-family: 'Syne', sans-serif;
  color: var(--muted);
  border: 1px solid transparent;
  background: none;
  transition: all 0.2s ease;
}

.tab:hover {
  color: var(--text);
}

.tab.active {
  background: var(--card);
  color: var(--text);
  border-color: var(--border);
}


/* ── 4. Stats Bar ─────────────────────────────────────────── */

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
}

.stat-val {
  font-size: 28px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
}

.stat-val.green  { color: var(--green); }
.stat-val.yellow { color: var(--yellow); }

.stat-label {
  font-size: 10px;
  color: var(--muted);
  margin-top: 3px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}


/* ── 5. Settings Row ──────────────────────────────────────── */

.settings-row {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
  align-items: center;
}

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

.pill-btn {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  font-family: 'Syne', sans-serif;
  cursor: pointer;
  transition: all 0.15s ease;
}

.pill-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.pill-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(124, 106, 247, 0.08);
}

.sound-toggle {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  font-family: 'Syne', sans-serif;
  cursor: pointer;
  transition: all 0.15s ease;
}

.sound-toggle.on {
  border-color: var(--green);
  color: var(--green);
  background: rgba(34, 197, 94, 0.08);
}


/* ── 6. Hand Animation SVGs ───────────────────────────────── */

.hands-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

.hand-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hand-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
  margin-bottom: 8px;
}

.hand-svg {
  width: 180px;
  height: 160px;
}

/* SVG finger fill classes */
.finger-palm     { fill: #3a3a45; }
.finger-inactive { fill: #2e2e38; transition: fill 0.2s, filter 0.2s; }


/* ── 7. Finger Legend & Key Hint ──────────────────────────── */

.finger-legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.fl-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: var(--muted);
}

.fl-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.key-hint {
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 8px;
  min-height: 22px;
}

.key-hint strong {
  color: var(--accent);
  font-size: 15px;
}


/* ── 8. Typing Box ────────────────────────────────────────── */

.typing-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 28px 20px;
  margin-bottom: 14px;
  position: relative;
  cursor: text;
  transition: border-color 0.2s;
}

.typing-box:focus-within {
  border-color: rgba(124, 106, 247, 0.4);
}

.text-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 21px;
  line-height: 2;
  letter-spacing: 0.4px;
  user-select: none;
  position: relative;
  min-height: 100px;
  word-break: break-word;
}

/* Individual character states */
.char {
  position: relative;
  transition: color 0.05s;
}

.char.pending { color: #555560; }

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

.char.wrong {
  color: var(--wrong);
  background: rgba(248, 113, 113, 0.12);
  border-radius: 2px;
}

/* Blinking cursor underline */
.char.cursor::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 2px;
  background: var(--cursor);
  animation: blink 0.8s infinite;
}

/* Hidden real input (captures keystrokes) */
#typing-input {
  position: absolute;
  opacity: 0;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: text;
  font-size: 1px;
}

/* Timer */
.timer-display {
  position: absolute;
  top: 10px;
  right: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--muted);
}

.timer-display span {
  color: var(--accent);
  font-weight: 700;
}

/* Progress bar */
.progress-wrap {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 16px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #7c6af7, #5cb8b2);
  border-radius: 2px;
  transition: width 0.1s linear;
}


/* ── 9. On-Screen Keyboard ────────────────────────────────── */

.keyboard-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 14px;
}

.kb-row {
  display: flex;
  gap: 4px;
  margin-bottom: 4px;
  justify-content: center;
}

.key {
  min-width: 36px;
  height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--card);
  cursor: default;
  transition: all 0.1s ease;
  position: relative;
}

.key.wide      { min-width: 52px; }
.key.xwide     { min-width: 68px; }
.key.space-key { min-width: 220px; }

/* Home-row marker (the bump you feel on F and J) */
.key.home-row {
  border-bottom: 2px solid rgba(124, 106, 247, 0.35);
}

/* Active / pressed state — color by finger */
.key.active {
  transform: scale(0.92) translateY(2px);
  color: #fff;
}

.key[data-f="L4"].active { background: var(--f-pinky);  border-color: var(--f-pinky);  box-shadow: 0 0 12px rgba(168,85,247,0.35); }
.key[data-f="L3"].active { background: var(--f-ring);   border-color: var(--f-ring);   box-shadow: 0 0 12px rgba(6,182,212,0.35); }
.key[data-f="L2"].active { background: var(--f-middle); border-color: var(--f-middle); box-shadow: 0 0 12px rgba(245,158,11,0.35); color: #000; }
.key[data-f="L1"].active { background: var(--f-index);  border-color: var(--f-index);  box-shadow: 0 0 12px rgba(34,197,94,0.35);  color: #000; }
.key[data-f="R1"].active { background: var(--f-index);  border-color: var(--f-index);  box-shadow: 0 0 12px rgba(34,197,94,0.35);  color: #000; }
.key[data-f="R2"].active { background: var(--f-middle); border-color: var(--f-middle); box-shadow: 0 0 12px rgba(245,158,11,0.35); color: #000; }
.key[data-f="R3"].active { background: var(--f-ring);   border-color: var(--f-ring);   box-shadow: 0 0 12px rgba(6,182,212,0.35); }
.key[data-f="R4"].active { background: var(--f-pinky);  border-color: var(--f-pinky);  box-shadow: 0 0 12px rgba(168,85,247,0.35); }
.key[data-f="TH"].active { background: var(--f-thumb);  border-color: var(--f-thumb);  box-shadow: 0 0 12px rgba(248,113,113,0.35); }

/* Error flash */
.key.err-flash {
  background: rgba(248, 113, 113, 0.45) !important;
  border-color: var(--red) !important;
  animation: errfl 0.25s ease;
}

/* Heatmap heat levels */
.key.heat1 { background: rgba(124, 106, 247, 0.10); }
.key.heat2 { background: rgba(124, 106, 247, 0.30); }
.key.heat3 { background: #7c6af7; color: #fff; }
.key.heat-err {
  background: rgba(248, 113, 113, 0.20) !important;
  border-color: rgba(248, 113, 113, 0.55) !important;
}


/* ── 10. Controls & Buttons ───────────────────────────────── */

.controls {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
}

.btn {
  padding: 10px 22px;
  border-radius: 10px;
  border: none;
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  letter-spacing: 0.2px;
}

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

.btn-primary:hover {
  background: #6b59e6;
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--accent);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 12px;
}


/* ── 11. Results Panel ────────────────────────────────────── */

.results-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  display: none;
  margin-top: 14px;
  animation: fadeIn 0.3s ease;
}

.results-panel.show {
  display: block;
}

.results-eyebrow {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.result-wpm {
  font-size: 64px;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  line-height: 1;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 20px 0;
}

.result-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}

.result-num {
  font-size: 22px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}

.result-lbl {
  font-size: 10px;
  color: var(--muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.results-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 4px;
}


/* ── 12. Lessons Tab ──────────────────────────────────────── */

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.lesson-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.lesson-card:hover,
.lesson-card.selected {
  border-color: var(--accent);
  background: rgba(124, 106, 247, 0.06);
}

.lesson-card h3 {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 4px;
}

.lesson-card p {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.5;
}

.lesson-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 10px;
  font-weight: 700;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-easy   { background: rgba(74,222,128,0.1); color: #4ade80; border: 1px solid rgba(74,222,128,0.25); }
.badge-medium { background: rgba(251,191,36,0.1); color: #fbbf24; border: 1px solid rgba(251,191,36,0.25); }
.badge-hard   { background: rgba(248,113,113,0.1);color: #f87171; border: 1px solid rgba(248,113,113,0.25); }

.lessons-start-row {
  margin-top: 16px;
  display: flex;
  justify-content: center;
}


/* ── 13. Heatmap Tab ──────────────────────────────────────── */

.heatmap-legend {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
  font-size: 11px;
  color: var(--muted);
  flex-wrap: wrap;
}

.hl-box {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}

.heatmap-errors {
  margin-top: 18px;
}

.heatmap-errors-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.error-keys-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.error-key-chip {
  padding: 5px 12px;
  background: rgba(248,113,113,0.10);
  border: 1px solid rgba(248,113,113,0.25);
  border-radius: 8px;
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  color: #f87171;
}


/* ── 14. Notification Toast ───────────────────────────────── */

.notif {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card);
  border: 1px solid var(--accent);
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  transform: translateY(70px);
  transition: transform 0.3s ease;
  z-index: 999;
}

.notif.show {
  transform: translateY(0);
}


/* ── 15. Animations ───────────────────────────────────────── */

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes errfl {
  0%   { transform: scale(1.12); }
  100% { transform: scale(1); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}