/* ==============================================================================
   TypeRush - Core Design System & Layout
   Palette: Default Serika Dark
   ============================================================================== */

:root {
  --bg-color: #323437;
  --main-color: #e2b714;
  --caret-color: #e2b714;
  --sub-color: #646669;
  --sub-alt-color: #2c2e31;
  --text-color: #d1d0c5;
  --error-color: #ca4754;
  --error-extra-color: #7e2a33;
  --colorful-error-color: #ca4754;
  --colorful-error-extra-color: #7e2a33;

  --font-family: 'JetBrains Mono', monospace;
  --ui-font-family: 'Roboto', sans-serif;

  --border-radius: 8px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --max-content-width: 1100px;
}

/* ------------------------------------------------------------------------------
   CSS Reset & Base
   ------------------------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--sub-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--text-color);
}

button {
  background: none;
  border: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  outline: none;
}

/* ------------------------------------------------------------------------------
   App Layout
   ------------------------------------------------------------------------------ */
.typerush-app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 2rem 2.5rem;
  max-width: var(--max-content-width);
  margin: 0 auto;
}

.site-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: 2rem 0;
}

/* ------------------------------------------------------------------------------
   Header
   ------------------------------------------------------------------------------ */
.site-header {
  width: 100%;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-branding .brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-color);
}

.brand-icon {
  font-size: 1.8rem;
  color: var(--main-color);
}

.brand-text .brand-subtitle {
  font-size: 0.75rem;
  color: var(--sub-color);
  display: block;
  line-height: 1;
  margin-bottom: -2px;
}

.brand-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-color);
  letter-spacing: -0.5px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-icon-btn {
  color: var(--sub-color);
  font-size: 1.1rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-icon-btn:hover {
  color: var(--text-color);
}

.user-display-name {
  font-size: 0.9rem;
  font-family: var(--ui-font-family);
}

/* ------------------------------------------------------------------------------
   Test Configuration Bar
   ------------------------------------------------------------------------------ */
.test-config-bar {
  background-color: var(--sub-alt-color);
  border-radius: var(--border-radius);
  padding: 0.4rem 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 0 auto 2.5rem auto;
  font-size: 0.85rem;
  color: var(--sub-color);
  width: fit-content;
  max-width: 100%;
  flex-wrap: wrap;
}

.config-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.config-divider {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--sub-color);
  opacity: 0.6;
}

.config-btn {
  color: var(--sub-color);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: color var(--transition-fast);
}

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

.config-btn.active {
  color: var(--main-color);
}

/* ------------------------------------------------------------------------------
   Live Stats Bar
   ------------------------------------------------------------------------------ */
.live-stats-bar {
  text-align: left;
  margin-bottom: 0.5rem;
  min-height: 2.5rem;
}

.live-stat-item {
  font-size: 1.8rem;
  color: var(--main-color);
  font-weight: 500;
}

/* ------------------------------------------------------------------------------
   Typing Area & Words
   ------------------------------------------------------------------------------ */
.typing-container {
  position: relative;
  outline: none;
  cursor: text;
}

.words-input {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  pointer-events: none;
  z-index: -1;
}

.words-wrapper {
  position: relative;
  font-size: 1.6rem;
  line-height: 1.7;
  min-height: 140px;
  max-height: 155px;
  overflow: hidden;
  user-select: none;
}

.words-placeholder {
  color: var(--sub-color);
  font-size: 1.25rem;
  padding: 1.5rem 0;
  width: 100%;
}

.words-container {
  display: flex;
  flex-wrap: wrap;
  column-gap: 0.65em;
  row-gap: 0.2em;
}

.word {
  display: inline-flex;
  color: var(--sub-color);
  transition: color 0.1s ease;
}

.word.active {
  color: var(--sub-color);
}

letter {
  position: relative;
  display: inline-block;
  transition: color 0.08s ease;
}

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

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

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

letter.missed {
  color: var(--error-color);
  opacity: 0.65;
  text-decoration: underline;
}

/* Caret */
#caret {
  position: absolute;
  width: 2px;
  height: 1.4em;
  background-color: var(--caret-color);
  border-radius: 1px;
  pointer-events: none;
  transition: left 0.08s ease, top 0.08s ease;
  z-index: 10;
  animation: caretBlink 1s infinite;
}

#caret.typing {
  animation: none;
  opacity: 1;
}

#caret.caret-block {
  width: 0.65em;
  opacity: 0.35;
  border-radius: 2px;
}

#caret.caret-underline {
  height: 3px !important;
  margin-top: 1.25em;
  border-radius: 1px;
}

#caret.caret-off {
  display: none !important;
}

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

/* Out of focus overlay */
.out-of-focus-overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  background-color: rgba(50, 52, 55, 0.4);
  z-index: 20;
  cursor: pointer;
}

.typing-container.out-of-focus .out-of-focus-overlay {
  display: flex;
}

.focus-notice {
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
}

/* ------------------------------------------------------------------------------
   Test Controls
   ------------------------------------------------------------------------------ */
.test-controls {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
}

.restart-btn {
  color: var(--sub-color);
  font-size: 1.3rem;
  padding: 0.5rem;
  border-radius: 50%;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.restart-btn:hover {
  color: var(--text-color);
  transform: rotate(45deg);
}

/* ------------------------------------------------------------------------------
   Results Screen — Monkeytype-caliber UI
   ------------------------------------------------------------------------------ */
.results-screen-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  width: 100%;
  max-width: 1050px;
  margin: 0 auto;
  animation: resultsReveal 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes resultsReveal {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.99);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Hero Section: Left Hero Stats + Right Chart */
.results-hero-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.75rem;
  align-items: stretch;
  width: 100%;
}

.results-hero-metrics {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}

.hero-stat-card {
  background: var(--sub-alt-color);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 1.15rem 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.hero-stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.hero-stat-card .stat-label {
  font-size: 1.1rem;
  color: var(--sub-color);
  font-weight: 600;
  text-transform: lowercase;
  font-family: var(--font-family);
  letter-spacing: 0.02em;
  margin-bottom: 0.2rem;
}

.hero-stat-card .stat-value {
  font-size: 3.8rem;
  font-weight: 800;
  line-height: 1;
  font-family: var(--font-family);
  letter-spacing: -0.02em;
}

.stat-value.highlight {
  color: var(--main-color);
  text-shadow: 0 0 20px rgba(226, 183, 20, 0.18);
}

/* Chart Canvas Card */
.results-chart-container {
  position: relative;
  min-height: 220px;
  width: 100%;
  background: var(--sub-alt-color);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.12);
}

/* Substats Grid */
.results-substats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  width: 100%;
}

.substat-card {
  background: var(--sub-alt-color);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  padding: 0.85rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.substat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.1);
}

.substat-label {
  font-size: 0.78rem;
  text-transform: lowercase;
  color: var(--sub-color);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.substat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-color);
  font-family: var(--font-family);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Semantic Characters Breakdown */
.char-count.char-correct {
  color: var(--main-color);
  font-weight: 700;
}

.char-count.char-incorrect {
  color: var(--error-color);
  font-weight: 700;
}

.char-count.char-extra {
  color: #ff9f43;
  font-weight: 700;
}

.char-count.char-missed {
  color: var(--sub-color);
  opacity: 0.75;
}

.char-slash {
  color: var(--sub-color);
  opacity: 0.35;
  margin: 0 2px;
}

/* Action Buttons Bar */
.results-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

/* Modern Button System */
.tr-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.35rem;
  border-radius: 24px;
  font-size: 0.92rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}

.tr-btn-primary {
  background-color: var(--main-color);
  color: var(--bg-color);
  box-shadow: 0 4px 14px rgba(226, 183, 20, 0.22);
}

.tr-btn-primary:hover {
  filter: brightness(1.12);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(226, 183, 20, 0.32);
  color: var(--bg-color);
}

.tr-btn-secondary {
  background-color: var(--sub-alt-color);
  color: var(--text-color);
  border-color: rgba(255, 255, 255, 0.06);
}

.tr-btn-secondary:hover {
  background-color: var(--sub-color);
  color: var(--bg-color);
  transform: translateY(-2px);
}

.tr-btn.copied {
  background-color: #2ed573;
  color: #fff;
  border-color: #2ed573;
}

.tr-btn.active {
  border-color: var(--main-color);
  color: var(--main-color);
}

.btn-kbd-hint kbd {
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.72rem;
  font-family: var(--font-family);
  color: inherit;
  margin-left: 2px;
}

/* Words Replay History & Burst Heatmaps */
.words-history-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-height: 200px;
  overflow-y: auto;
  padding: 1rem;
  background: var(--sub-alt-color);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  margin-top: 0.5rem;
  animation: fadeIn 0.25s ease;
}

.word-history-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-family: var(--font-family);
  background: var(--bg-color);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: transform 0.15s;
}

.word-history-chip:hover {
  transform: scale(1.05);
}

.word-history-chip .chip-word {
  color: var(--text-color);
}

.word-history-chip .chip-wpm {
  font-size: 0.75rem;
  color: var(--sub-color);
}

.word-history-chip.burst-fast {
  border-color: var(--main-color);
}
.word-history-chip.burst-fast .chip-wpm {
  color: var(--main-color);
  font-weight: 700;
}

.word-history-chip.burst-good {
  border-color: #2ed573;
}
.word-history-chip.burst-good .chip-wpm {
  color: #2ed573;
  font-weight: 700;
}

.word-history-chip.burst-slow {
  border-color: #ff9f43;
}
.word-history-chip.burst-slow .chip-wpm {
  color: #ff9f43;
}

.word-history-chip.burst-error {
  border-color: var(--error-color);
}
.word-history-chip.burst-error .chip-wpm {
  color: var(--error-color);
}

/* ------------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------------ */
.site-footer {
  width: 100%;
  font-size: 0.85rem;
  color: var(--sub-color);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-left {
  display: flex;
  gap: 1rem;
}

.footer-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.footer-center kbd {
  background-color: var(--sub-alt-color);
  color: var(--text-color);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.8rem;
}

.hint-label {
  color: var(--sub-color);
  margin-right: 0.75rem;
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-theme-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--sub-color);
  transition: color var(--transition-fast);
}

.footer-theme-btn:hover {
  color: var(--text-color);
}

.version-tag {
  opacity: 0.6;
}

/* Responsive adjustments */
@media (max-width: 820px) {
  .results-hero-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .results-hero-metrics {
    flex-direction: row;
    gap: 1rem;
  }
  .hero-stat-card {
    flex: 1;
    text-align: center;
  }
  .hero-stat-card .stat-value {
    font-size: 3rem;
  }
  .results-substats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .typerush-app {
    padding: 1.25rem 1rem;
  }
  .footer-container {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
}

@media (max-width: 520px) {
  .results-hero-metrics {
    flex-direction: column;
  }
  .results-substats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stat-card .stat-value {
    font-size: 2.6rem;
  }
  .results-actions {
    flex-direction: column;
    width: 100%;
  }
  .results-actions .tr-btn {
    width: 100%;
    justify-content: center;
  }
}

/* ------------------------------------------------------------------------------
   Modal System (Theme Switcher, Settings, etc.)
   ------------------------------------------------------------------------------ */
.tr-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  padding: 1.5rem;
}

.tr-modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.tr-modal-card {
  background-color: var(--sub-alt-color);
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 650px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transform: translateY(12px) scale(0.98);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.tr-modal-backdrop.active .tr-modal-card {
  transform: translateY(0) scale(1);
}

.tr-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tr-modal-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-color);
}

.tr-modal-title i {
  color: var(--main-color);
}

.tr-modal-close {
  color: var(--sub-color);
  font-size: 1.2rem;
  transition: color var(--transition-fast);
}

.tr-modal-close:hover {
  color: var(--text-color);
}

.tr-modal-search {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.5rem;
  background-color: rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tr-modal-search i {
  color: var(--sub-color);
  font-size: 0.95rem;
}

.tr-modal-search input {
  background: none;
  border: none;
  color: var(--text-color);
  font-family: inherit;
  font-size: 0.95rem;
  width: 100%;
  outline: none;
}

.tr-modal-search input::placeholder {
  color: var(--sub-color);
}

.tr-modal-body {
  padding: 1.25rem 1.5rem;
  overflow-y: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.75rem;
}

/* Custom Scrollbar */
.tr-modal-body::-webkit-scrollbar {
  width: 6px;
}
.tr-modal-body::-webkit-scrollbar-thumb {
  background-color: var(--sub-color);
  border-radius: 3px;
}

/* Theme Card */
.theme-card {
  background-color: var(--bg-color);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.1s ease, border-color 0.1s ease, background-color 0.1s ease;
}

.theme-card:hover {
  transform: translateY(-2px);
  border-color: var(--main-color);
}

.theme-card.selected {
  border-color: var(--main-color);
}

.theme-card-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-card-name {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
}

.selected-icon {
  color: var(--main-color);
  font-size: 0.8rem;
}

.theme-color-bubbles {
  display: flex;
  gap: 0.35rem;
}

.bubble {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.no-themes-found {
  grid-column: 1 / -1;
  text-align: center;
  padding: 2rem 0;
  color: var(--sub-color);
  font-size: 0.95rem;
}

/* ------------------------------------------------------------------------------
   Sound Modal UI
   ------------------------------------------------------------------------------ */
.sound-modal-body {
  display: flex !important;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.5rem;
}

.sound-setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sound-setting-row label {
  font-weight: 500;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.slider-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.slider-wrapper input[type="range"] {
  accent-color: var(--main-color);
  cursor: pointer;
  width: 140px;
}

#volume-val-display {
  font-size: 0.9rem;
  color: var(--main-color);
  min-width: 40px;
  text-align: right;
  font-weight: 600;
}

.sound-setting-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sound-setting-group .group-title {
  font-size: 0.9rem;
  color: var(--sub-color);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sound-pack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.6rem;
}

.sound-pack-btn {
  background-color: var(--bg-color);
  color: var(--sub-color);
  border: 1px solid transparent;
  padding: 0.65rem 0.85rem;
  border-radius: 6px;
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.sound-pack-btn:hover {
  color: var(--text-color);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.sound-pack-btn.selected {
  border-color: var(--main-color);
  color: var(--main-color);
  background-color: rgba(226, 183, 20, 0.06);
}

.sound-pack-btn i {
  font-size: 0.75rem;
}