/* =========================================================================
   TYPEFLOW — STYLESHEET
   Sections:
   1. Design tokens (CSS variables, dark + light themes)
   2. Reset & base
   3. Background / ambient glow
   4. Glassmorphism utility
   5. Header
   6. Controls (segmented switches)
   7. Test card (text display, caret, progress bar)
   8. Live stats grid
   9. Buttons & actions
   10. Results / modal overlays
   11. Dashboard panels (badges, heatmap, leaderboard, chart)
   12. Footer
   13. Animations
   14. Responsive breakpoints
   15. Accessibility (focus states, reduced motion)
   ========================================================================= */

/* ---------- 1. DESIGN TOKENS ---------- */
:root {
  --font-display: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Dark theme (default) — deep indigo dusk with a brass typewriter accent */
  --bg-1: #0b0a1f;
  --bg-2: #1b1640;
  --bg-3: #2d2467;
  --glass-bg: rgba(255, 255, 255, 0.055);
  --glass-bg-strong: rgba(255, 255, 255, 0.09);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-shadow: rgba(0, 0, 0, 0.45);
  --text-primary: #f4f2fa;
  --text-secondary: #a9a3c4;
  --text-muted: #6c6590;
  --accent: #ffb454;
  --accent-soft: rgba(255, 180, 84, 0.18);
  --on-accent: #1a1410;
  --accent-2: #8b7cf6;
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.16);
  --error: #fb7185;
  --error-soft: rgba(251, 113, 133, 0.16);
  --untyped: #524c78;
  --track-bg: rgba(140, 130, 190, 0.16);

  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-theme='light'] {
  --bg-1: #f6f1e7;
  --bg-2: #ece2cd;
  --bg-3: #e3d3ab;
  --glass-bg: rgba(255, 255, 255, 0.5);
  --glass-bg-strong: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(62, 48, 20, 0.13);
  --glass-shadow: rgba(60, 48, 20, 0.14);
  --text-primary: #2a2418;
  --text-secondary: #5b5240;
  --text-muted: #938868;
  --accent: #c9762b;
  --accent-soft: rgba(201, 118, 43, 0.16);
  --on-accent: #fff8ef;
  --accent-2: #6a59c9;
  --success: #1f9d55;
  --success-soft: rgba(31, 157, 85, 0.14);
  --error: #c63852;
  --error-soft: rgba(198, 56, 82, 0.12);
  --untyped: #b9ac86;
  --track-bg: rgba(120, 100, 60, 0.14);
}

/* ---------- 2. RESET & BASE ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text-primary);
  background:
    radial-gradient(circle at 12% -10%, var(--bg-3), transparent 55%),
    radial-gradient(circle at 90% 110%, var(--bg-2), transparent 50%),
    linear-gradient(165deg, var(--bg-1), var(--bg-2) 55%, var(--bg-1));
  background-attachment: fixed;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { font-family: var(--font-display); margin: 0; }
p { margin: 0; }
button { font-family: inherit; }

/* ---------- 3. AMBIENT BACKGROUND GLOW ---------- */
.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(420px circle at 20% 25%, var(--accent-soft), transparent 70%),
    radial-gradient(480px circle at 82% 70%, rgba(139, 124, 246, 0.14), transparent 70%);
  animation: drift 18s ease-in-out infinite alternate;
}

/* ---------- 4. GLASSMORPHISM UTILITY ---------- */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px) saturate(120%);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  box-shadow: 0 8px 32px var(--glass-shadow);
  border-radius: var(--radius-lg);
}

.app {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ---------- 5. HEADER ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  animation: fadeInUp 0.6s ease both;
}

.brand { display: flex; align-items: center; gap: 14px; }

.brand-mark {
  font-size: 1.8rem;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  box-shadow: 0 6px 18px var(--accent-soft);
}

.brand-text h1 { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; }
.brand-text p { font-size: 0.85rem; color: var(--text-secondary); margin-top: 2px; }

.header-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.name-field {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 8px 14px;
}
.name-field span { font-size: 0.78rem; color: var(--text-muted); font-weight: 600; }
.name-field input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  width: 90px;
}

.btn-ghost {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-ghost:hover { color: var(--text-primary); background: var(--glass-bg-strong); }

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.icon-btn:hover { transform: rotate(-12deg) scale(1.05); background: var(--glass-bg-strong); }

/* ---------- 6. CONTROLS ---------- */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding: 20px 24px;
  animation: fadeInUp 0.6s ease 0.05s both;
}

.control-group { display: flex; flex-direction: column; gap: 8px; }
.control-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.segmented {
  display: flex;
  background: var(--track-bg);
  border-radius: 999px;
  padding: 4px;
  gap: 4px;
}

.segment {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: var(--transition);
}
.segment:hover:not(.active) { color: var(--text-primary); background: rgba(255, 255, 255, 0.08); }
.segment.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  box-shadow: 0 4px 14px var(--accent-soft);
}

/* ---------- 7. TEST CARD ---------- */
.test-card {
  padding: 24px;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.progress-track {
  height: 6px;
  background: var(--track-bg);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 24px;
}
.progress-fill {
  height: 100%;
  width: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 1s linear, background 0.4s ease;
}
.progress-fill.urgent {
  background: linear-gradient(90deg, var(--error), #ff8fa3);
  animation: pulseBar 1s ease-in-out infinite;
}

.text-display-wrap {
  position: relative;
  border-radius: var(--radius-md);
  cursor: text;
}

.text-display {
  padding: 28px;
  min-height: 150px;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.4vw, 1.45rem);
  line-height: 1.85;
  letter-spacing: 0.2px;
  word-break: break-word;
}

.char { color: var(--untyped); position: relative; transition: none; }
.char.correct { color: var(--success); }
.char.incorrect { color: var(--error); background: var(--error-soft); border-radius: 3px; }
.char.current::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 1px;
  bottom: 1px;
  width: 2px;
  background: var(--accent);
  animation: blink 1s steps(1) infinite;
}

.focus-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
  background: rgba(10, 8, 25, 0.45);
  backdrop-filter: none;
  color: var(--text-primary);
  font-weight: 600;
  border-radius: var(--radius-md);
  opacity: 1;
  transition: opacity var(--transition);
  pointer-events: none;
}
.focus-hint.hidden { opacity: 0; }

.sr-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  border: none;
  resize: none;
  cursor: text;
  z-index: 2;
  padding: 28px;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.4vw, 1.45rem);
}
.sr-input:disabled { cursor: default; }

/* ---------- 8. LIVE STATS GRID ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  animation: fadeInUp 0.6s ease 0.15s both;
}

.stat-card {
  padding: 18px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}
.stat-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  color: var(--text-primary);
}
.stat-value small { font-size: 0.55em; color: var(--text-secondary); margin-left: 1px; }
.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
#stat-wpm { color: var(--accent); }
#time-card.time-low .stat-value { color: var(--error); }

/* ---------- 9. BUTTONS & ACTIONS ---------- */
.actions {
  display: flex;
  justify-content: center;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  border: none;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 8px 22px var(--accent-soft);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px var(--accent-soft); }
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: var(--transition);
}
.btn-secondary:hover { background: var(--glass-bg-strong); }

kbd {
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.78em;
  font-family: var(--font-mono);
}

/* ---------- 10. RESULTS / MODAL OVERLAYS ---------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(6, 5, 18, 0.6);
  animation: fadeIn 0.25s ease both;
}

.overlay[hidden] {
  display: none;
}

.overlay-card {
  width: 100%;
  max-width: 440px;
  padding: 36px 32px;
  text-align: center;
  animation: popIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.overlay-card h2 { font-size: 1.4rem; margin-bottom: 18px; }

.results-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  color: var(--text-primary);
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 20px;
  animation: popIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) 0.1s both;
}
.results-badge-icon { font-size: 1.2rem; }

.results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 18px;
}
.results-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 16px 8px;
}
.results-item span {
  display: block;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--accent);
}
.results-item label { font-size: 0.74rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

.results-best { color: var(--success); font-weight: 700; margin-bottom: 18px; }

.overlay-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

.modal-hint { color: var(--text-secondary); font-size: 0.88rem; margin: -8px 0 16px; }
.custom-textarea {
  width: 100%;
  min-height: 140px;
  resize: vertical;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 14px;
  margin-bottom: 18px;
  outline: none;
  transition: border-color var(--transition);
}
.custom-textarea:focus { border-color: var(--accent); }
.custom-textarea.error-shake { animation: shake 0.4s ease; border-color: var(--error); }

/* ---------- 11. DASHBOARD PANELS ---------- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  animation: fadeInUp 0.6s ease 0.25s both;
}

.panel { padding: 22px 24px; }
.panel h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Achievements */
.badges { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.badge {
  flex: 1 1 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 8px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  opacity: 0.45;
  filter: grayscale(1);
  transition: var(--transition);
}
.badge.unlocked {
  opacity: 1;
  filter: none;
  background: var(--accent-soft);
  border-color: var(--accent);
  animation: popIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.badge-icon { font-size: 1.5rem; }
.badge-name { font-size: 0.78rem; font-weight: 700; }
.badge-req { font-size: 0.68rem; color: var(--text-muted); }
.best-wpm { font-size: 0.85rem; color: var(--text-secondary); }
.best-wpm strong { color: var(--accent); font-family: var(--font-display); }

/* Keyboard heatmap */
.keyboard-heatmap { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.keyboard-row { display: flex; gap: 6px; justify-content: center; }
.key {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  transition: var(--transition);
}
.key.space { width: 168px; font-size: 0.62rem; letter-spacing: 0.1em; }

/* Leaderboard */
.leaderboard { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.leaderboard li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.86rem;
}
.leaderboard li.empty { color: var(--text-muted); justify-content: center; font-style: italic; }
.leaderboard .rank { font-weight: 800; color: var(--accent); width: 28px; font-family: var(--font-display); }
.leaderboard .lb-name { flex: 1; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.leaderboard .lb-wpm { font-weight: 700; color: var(--text-primary); }
.leaderboard .lb-acc { color: var(--text-muted); font-size: 0.78rem; width: 44px; text-align: right; }

/* History chart */
#history-chart { width: 100%; height: 200px; display: block; }

/* ---------- 12. FOOTER ---------- */
.app-footer { text-align: center; padding: 12px 0 4px; color: var(--text-muted); font-size: 0.8rem; }

/* ---------- 13. ANIMATIONS ---------- */
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn { from { opacity: 0; transform: scale(0.92); } to { opacity: 1; transform: scale(1); } }
@keyframes pulseBar { 0%, 100% { opacity: 1; } 50% { opacity: 0.55; } }
@keyframes drift {
  from { transform: translate(0, 0); }
  to { transform: translate(2%, 3%); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* ---------- 14. RESPONSIVE ---------- */
@media (max-width: 860px) {
  .dashboard-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .app { padding: 24px 16px 48px; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .app-header { flex-direction: column; align-items: flex-start; }
  .header-actions { width: 100%; justify-content: space-between; }
  .controls { flex-direction: column; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .results-grid { grid-template-columns: repeat(2, 1fr); }
  .name-field input { width: 64px; }
  .key { width: 26px; height: 26px; font-size: 0.62rem; }
  .key.space { width: 130px; }
  .brand-text h1 { font-size: 1.25rem; }
}

/* ---------- 15. ACCESSIBILITY ---------- */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.segment:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}