/* ============================================================
   TYPE FLOW — typing.css
   The typing surface: live stats, words, letters, caret,
   focus overlay, footer hints
   ============================================================ */

/* ============================================================
   1. TYPING WRAP (outer container)
   ============================================================ */

.typing-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding: var(--space-xl) var(--space-lg);
  background-color: var(--bg-elevated);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  transition: border-color var(--transition-base);
}

.typing-wrap:focus-within {
  border-color: var(--border-strong);
}

/* ============================================================
   2. LIVE STATS
   ============================================================ */

.live-stats {
  display: flex;
  gap: var(--space-xl);
  align-items: baseline;
  padding-bottom: var(--space-md);
  border-bottom: var(--border-width) solid var(--border);
  transition: opacity var(--transition-base);
}

.live-stats.hidden {
  opacity: 0;
  pointer-events: none;
  height: 0;
  padding: 0;
  border: none;
  overflow: hidden;
}

.live-stat {
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
}

.live-stat__label {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--text-muted);
  order: 2;
}

.live-stat__value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--tracking-tight);
  transition: color var(--transition-fast);
  order: 1;
  min-width: 2ch;
}

.live-stat__value.skeleton {
  color: var(--text-dim);
  font-weight: 500;
  letter-spacing: 0.15em;
  font-size: var(--text-md);
}

/* Live stat color feedback during test */
.live-stat--warn .live-stat__value {
  color: var(--warning);
}

.live-stat--error .live-stat__value {
  color: var(--error);
}

/* ============================================================
   3. TYPING CONTAINER
   ============================================================ */

.typing-container {
  position: relative;
  min-height: 220px;
  padding: var(--space-lg) 0;
  cursor: text;
  outline: none;
}

.typing-container:focus {
  outline: none;
}

/* ============================================================
   4. WORDS
   ============================================================ */

.words {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em 0.9em;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--text-dim);
  user-select: none;
  -webkit-user-select: none;
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* --- Individual word --- */
.word {
  display: inline-flex;
  flex-wrap: nowrap;
  position: relative;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition:
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.word.active {
  border-bottom-color: var(--accent);
}

.word.errored {
  border-bottom-color: var(--error-dim);
}

/* --- Letter --- */
.letter {
  display: inline-block;
  position: relative;
  color: var(--text-dim);
  transition: color var(--duration-instant) linear;
  will-change: color;
}

.letter.correct {
  color: var(--text-primary);
}

.letter.incorrect {
  color: var(--error);
}

.letter.incorrect::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background-color: var(--error);
  border-radius: var(--radius-full);
}

.letter.extra {
  color: var(--error);
  opacity: 0.7;
}

.letter.missed {
  color: var(--error);
  text-decoration: underline;
  text-decoration-color: var(--error);
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  opacity: 0.85;
}

/* Blind mode: hide correctness coloring */
.typing-wrap[data-blind="true"] .letter.correct {
  color: var(--text-primary);
}

.typing-wrap[data-blind="true"] .letter.incorrect {
  color: var(--text-primary);
}

.typing-wrap[data-blind="true"] .letter.incorrect::after {
  display: none;
}

/* ============================================================
   5. CARET
   ============================================================ */

.caret {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 1.5em;
  background-color: var(--accent);
  border-radius: var(--radius-full);
  pointer-events: none;
  z-index: 5;
  will-change: left, top;
  transition:
    left var(--duration-fast) var(--ease-snap),
    top var(--duration-fast) var(--ease-snap),
    opacity var(--duration-fast) var(--ease-out);
}

/* Smooth variant: springier interpolation */
.caret.smooth {
  transition:
    left var(--duration-base) var(--ease-spring),
    top var(--duration-base) var(--ease-spring),
    opacity var(--duration-fast) var(--ease-out);
}

/* Block variant: block behind current letter */
.caret.block {
  width: 0.6em;
  background-color: var(--accent);
  opacity: 0.55;
  border-radius: 2px;
  box-shadow: 0 0 0 1px var(--accent);
}

/* Underline variant: sits below the letter */
.caret.underline {
  width: 0.6em;
  height: 3px;
  background-color: var(--accent);
  border-radius: var(--radius-full);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* Off variant */
.caret.off {
  display: none;
}

/* Blink when idle */
.caret.blink {
  animation: caret-blink 1s steps(2, start) infinite;
}

.caret.smooth.blink {
  animation: caret-pulse 1.2s var(--ease-in-out) infinite;
}

/* ============================================================
   6. FOCUS OVERLAY
   ============================================================ */

.focus-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  background-color: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: var(--radius-xl);
  z-index: 10;
  cursor: pointer;
  transition:
    opacity var(--duration-base) var(--ease-out),
    backdrop-filter var(--duration-base) var(--ease-out);
}

.focus-overlay.hidden {
  opacity: 0;
  pointer-events: none;
  backdrop-filter: blur(0);
}

.focus-overlay__text {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-muted);
  letter-spacing: var(--tracking-wide);
  text-align: center;
  line-height: 1.5;
  user-select: none;
}

.focus-overlay__text::before {
  content: '⌨';
  display: block;
  font-size: var(--text-2xl);
  margin-bottom: var(--space-sm);
  opacity: 0.4;
}

/* ============================================================
   7. TEST FOOTER (hints)
   ============================================================ */

.test-footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  justify-content: center;
  padding-top: var(--space-md);
  border-top: var(--border-width) solid var(--border);
}

.hint {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  user-select: none;
}

.hint .kbd {
  font-size: var(--text-2xs);
  padding: 0.1em 0.4em;
  min-width: 1.4em;
}

.hint__sep {
  opacity: 0.6;
}

.hint__label {
  margin-left: var(--space-2xs);
  color: var(--text-muted);
}

/* ============================================================
   8. ZEN MODE
   ============================================================ */

.words[data-zen="true"] {
  justify-content: flex-start;
  min-height: 180px;
}

.zen-placeholder {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-dim);
  font-style: italic;
  letter-spacing: var(--tracking-normal);
}

/* ============================================================
   9. LINE-WRAP TRANSITION
   When a word moves to a new line, animate it sliding up
   ============================================================ */

.words.wrapping .word {
  animation: word-wrap-up var(--duration-base) var(--ease-out);
}

/* ============================================================
   10. TYPING STATE FEEDBACK
   ============================================================ */

/* Error streak shake on the container */
.typing-container.shake {
  animation: shake 180ms var(--ease-in-out);
}

/* Combo pulse on word completion */
.words.combo-pulse .word.active {
  animation: combo-pulse 320ms var(--ease-spring);
}

/* ============================================================
   11. KEYFRAMES
   ============================================================ */

@keyframes caret-blink {
  0%, 49%   { opacity: 1; }
  50%, 100% { opacity: 0.15; }
}

@keyframes caret-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

@keyframes word-wrap-up {
  from {
    transform: translateY(8px);
    opacity: 0.5;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-4px); }
  40%      { transform: translateX(4px); }
  60%      { transform: translateX(-3px); }
  80%      { transform: translateX(3px); }
}

@keyframes combo-pulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.04); }
  100% { transform: scale(1); }
}

/* ============================================================
   12. RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .words {
    font-size: var(--text-md);
    line-height: 1.7;
  }

  .live-stats {
    gap: var(--space-lg);
  }

  .live-stat__value {
    font-size: var(--text-lg);
  }
}

@media (max-width: 640px) {
  .typing-wrap {
    padding: var(--space-lg) var(--space-md);
    gap: var(--space-md);
  }

  .typing-container {
    min-height: 180px;
    padding: var(--space-md) 0;
  }

  .words {
    font-size: var(--text-base);
    line-height: 1.7;
    gap: 0.3em 0.7em;
  }

  .live-stats {
    gap: var(--space-md);
    padding-bottom: var(--space-sm);
  }

  .live-stat__value {
    font-size: var(--text-base);
  }

  .test-footer {
    gap: var(--space-sm);
  }

  .hint__label {
    display: none;
  }
}

@media (max-width: 400px) {
  .words {
    font-size: var(--text-sm);
  }

  .live-stat__label {
    display: none;
  }
}

/* ============================================================
   13. REDUCED MOTION
   ============================================================ */

html[data-reduce-motion="true"] .caret,
html[data-reduce-motion="true"] .caret.smooth,
html[data-reduce-motion="true"] .word,
html[data-reduce-motion="true"] .letter {
  transition: none !important;
}

html[data-reduce-motion="true"] .caret.blink,
html[data-reduce-motion="true"] .caret.smooth.blink {
  animation: none !important;
  opacity: 1;
}

html[data-reduce-motion="true"] .words.wrapping .word,
html[data-reduce-motion="true"] .typing-container.shake,
html[data-reduce-motion="true"] .words.combo-pulse .word.active {
  animation: none !important;
}