:root {
  --bg: #0c0c14;
  --surface-1: #141420;
  --surface-2: #1c1c2a;
  --surface-3: #242434;
  --accent: #c9a86c;
  --accent-dim: rgba(201, 168, 108, 0.13);
  --accent-border: rgba(201, 168, 108, 0.28);
  --blue: #8b9cf4;
  --blue-dim: rgba(139, 156, 244, 0.13);
  --blue-border: rgba(139, 156, 244, 0.28);
  --rose: #e88fa0;
  --rose-dim: rgba(232, 143, 160, 0.13);
  --rose-border: rgba(232, 143, 160, 0.28);
  --correct: #52e38a;
  --correct-dim: rgba(82, 227, 138, 0.13);
  --error: #ff6b6b;
  --error-dim: rgba(255, 107, 107, 0.13);
  --text: #ede8df;
  --muted: rgba(237, 232, 223, 0.55);
  --dim: rgba(237, 232, 223, 0.28);
  --faint: rgba(237, 232, 223, 0.13);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --radius-xl: 24px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background:
    linear-gradient(180deg, rgba(36, 36, 52, 0.38), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
}

.app-shell {
  width: min(100%, 780px);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(18px, 4vw, 34px);
}

.screen {
  min-height: calc(100vh - clamp(36px, 8vw, 68px));
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.topline,
.header-row,
.stat-row,
.mode-duration-row,
.game-toolbar,
.button-row,
.answer-row,
.stat-topline,
.confirm-row {
  display: flex;
  align-items: center;
}

.topline,
.header-row,
.game-toolbar,
.stat-topline {
  justify-content: space-between;
  gap: 16px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.logo-mark {
  width: 58px;
  height: 58px;
  flex: 0 0 auto;
  border: 1px solid var(--accent-border);
  border-radius: 18px;
  background: var(--accent-dim);
  display: grid;
  place-items: center;
}

.logo-mark svg {
  width: 42px;
  height: 42px;
}

.eyebrow {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin: 0;
}

.title {
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.3rem);
  font-weight: 800;
  line-height: 1;
}

.subtitle {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

.ghost-button,
.back-button,
.text-button {
  min-height: 40px;
  color: var(--accent);
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px 10px;
}

.ghost-button:hover,
.back-button:hover,
.text-button:hover {
  background: var(--accent-dim);
}

.mode-list,
.setup-list,
.stats-list {
  display: grid;
  gap: 12px;
}

.mode-card,
.panel,
.stat-card,
.stat-row-card,
.feedback-panel,
.confirm-panel {
  border: 1px solid var(--border);
  background: var(--surface-1);
  border-radius: var(--radius-xl);
}

.mode-card {
  width: 100%;
  position: relative;
  overflow: hidden;
  display: flex;
  gap: 16px;
  align-items: center;
  min-height: 118px;
  padding: 18px 20px;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.mode-card:hover {
  background: var(--surface-2);
}

.mode-card[data-accent="amber"]:hover {
  border-color: var(--accent-border);
}

.mode-card[data-accent="blue"]:hover {
  border-color: var(--blue-border);
}

.mode-card[data-accent="rose"]:hover {
  border-color: var(--rose-border);
}

.mode-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  font-size: 1.25rem;
  font-weight: 800;
}

.mode-card[data-accent="amber"] .mode-icon {
  color: var(--accent);
  background: var(--accent-dim);
}

.mode-card[data-accent="blue"] .mode-icon {
  color: var(--blue);
  background: var(--blue-dim);
}

.mode-card[data-accent="rose"] .mode-icon {
  color: var(--rose);
  background: var(--rose-dim);
}

.mode-body {
  min-width: 0;
  flex: 1;
}

.mode-title,
.section-title,
.screen-title,
.feedback-title {
  font-family: var(--font-display);
  font-weight: 800;
}

.mode-title {
  font-size: 1.28rem;
  margin-bottom: 4px;
}

.mode-subtitle,
.small-muted,
.stat-label {
  color: var(--muted);
}

.mode-subtitle {
  font-size: 0.92rem;
  line-height: 1.35;
}

.mode-duration-row {
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.pill {
  min-width: 56px;
  min-height: 32px;
  border-radius: 999px;
  border: 1px solid var(--blue-border);
  background: transparent;
  color: var(--blue);
  cursor: pointer;
  padding: 6px 12px;
  font-weight: 700;
}

.pill.is-selected {
  background: var(--blue);
  color: var(--bg);
}

.stats-button {
  min-height: 58px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  cursor: pointer;
}

.stats-button:hover {
  border-color: var(--border-strong);
}

.bars-icon {
  width: 28px;
  height: 24px;
  display: flex;
  align-items: end;
  gap: 4px;
}

.bars-icon span {
  width: 6px;
  border-radius: 3px;
  background: var(--accent);
}

.bars-icon span:nth-child(1) {
  height: 9px;
}

.bars-icon span:nth-child(2) {
  height: 16px;
}

.bars-icon span:nth-child(3) {
  height: 23px;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
}

.back-chevron {
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1;
}

.screen-heading {
  min-width: 0;
}

.screen-title {
  font-size: clamp(1.45rem, 5vw, 2rem);
  line-height: 1.05;
}

.setup-list {
  padding-bottom: 86px;
}

.setup-section {
  display: grid;
  gap: 10px;
}

.section-label {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
}

.chip-row,
.playback-grid {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip,
.playback-option {
  min-height: 38px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface-1);
  cursor: pointer;
  padding: 8px 15px;
  white-space: nowrap;
}

.chip.mono {
  font-family: var(--font-mono);
  font-size: 0.84rem;
}

.chip.is-selected {
  background: var(--accent);
  border-color: var(--accent-border);
  color: var(--bg);
  font-weight: 800;
}

.chip.is-soft-selected {
  background: var(--accent-dim);
  border-color: var(--accent-border);
  color: var(--accent);
}

.preview-line {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
}

.playback-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.playback-option {
  border-radius: var(--radius-md);
  color: var(--muted);
  text-align: center;
  white-space: normal;
  width: 100%;
}

.playback-option.is-selected {
  background: var(--surface-3);
  border-color: var(--border-strong);
  color: var(--text);
}

.volume-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.volume-value {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 800;
}

.volume-slider {
  width: 100%;
  height: 34px;
  margin: 0;
  accent-color: var(--accent);
  background: transparent;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.volume-slider::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: var(--surface-3);
  border: 1px solid var(--border);
}

.volume-slider::-webkit-slider-thumb {
  width: 20px;
  height: 20px;
  margin-top: -8px;
  border-radius: 50%;
  border: 2px solid var(--bg);
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--accent-dim);
  appearance: none;
}

.volume-slider::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: var(--surface-3);
  border: 1px solid var(--border);
}

.volume-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--bg);
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--accent-dim);
}

.sticky-action {
  position: fixed;
  left: 50%;
  bottom: 0;
  width: min(100%, 780px);
  transform: translateX(-50%);
  padding: 38px clamp(18px, 4vw, 34px) 16px;
  background: linear-gradient(180deg, transparent, var(--bg) 40%, var(--bg));
}

.primary-button,
.secondary-button,
.answer-button {
  border-radius: var(--radius-md);
  cursor: pointer;
}

.primary-button {
  width: 100%;
  min-height: 56px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 800;
  padding: 14px 18px;
}

.primary-button:disabled {
  background: var(--surface-2);
  color: var(--dim);
  cursor: not-allowed;
}

.secondary-button {
  min-height: 48px;
  background: var(--surface-1);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 12px 16px;
}

.secondary-button:disabled {
  color: var(--dim);
  cursor: not-allowed;
}

.game-screen {
  gap: 14px;
}

.game-toolbar {
  min-height: 48px;
}

.mode-name {
  color: var(--accent);
  font-weight: 700;
}

.stat-cluster {
  display: flex;
  gap: clamp(12px, 4vw, 22px);
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.stat-pill {
  min-width: 52px;
  text-align: center;
}

.stat-value {
  display: block;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 1.26rem;
  font-weight: 800;
  line-height: 1;
}

.stat-value.muted {
  color: var(--muted);
}

.stat-value.danger {
  color: var(--error);
}

.stat-label {
  display: block;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-top: 4px;
}

.hearts {
  display: flex;
  gap: 4px;
  color: var(--rose);
  font-size: 1.1rem;
}

.hearts .lost {
  color: var(--dim);
}

.feedback-panel {
  min-height: 104px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 18px;
}

.feedback-panel.playing {
  border-color: transparent;
  background: transparent;
}

.feedback-panel.correct {
  background: var(--correct-dim);
  border-color: rgba(82, 227, 138, 0.33);
}

.feedback-panel.incorrect {
  background: var(--error-dim);
  border-color: rgba(255, 107, 107, 0.33);
}

.feedback-panel.gameover,
.feedback-panel.timeout {
  background: var(--accent-dim);
  border-color: var(--accent-border);
}

.feedback-title {
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  line-height: 1.1;
}

.feedback-title.correct-color {
  color: var(--correct);
}

.feedback-title.error-color {
  color: var(--error);
}

.feedback-title.accent-color {
  color: var(--accent);
}

.feedback-code {
  color: var(--error);
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  margin: 5px 0;
}

.feedback-detail {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  margin-top: 7px;
}

.wave-bars {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 42px;
}

.wave-bars span {
  width: 4px;
  border-radius: 999px;
  background: var(--blue);
  animation: wave 760ms infinite ease-in-out alternate;
}

.wave-bars span:nth-child(1) {
  height: 12px;
}

.wave-bars span:nth-child(2) {
  height: 18px;
  animation-delay: 100ms;
}

.wave-bars span:nth-child(3) {
  height: 26px;
  animation-delay: 200ms;
}

.wave-bars span:nth-child(4) {
  height: 34px;
  animation-delay: 300ms;
}

.wave-bars span:nth-child(5) {
  height: 40px;
  animation-delay: 400ms;
}

@keyframes wave {
  from {
    transform: scaleY(0.32);
  }
  to {
    transform: scaleY(1);
  }
}

.button-row {
  gap: 10px;
}

.button-row .primary-button {
  flex: 2;
}

.button-row .secondary-button {
  flex: 1;
}

.answer-grid {
  display: grid;
  gap: 7px;
}

.answer-row {
  gap: 7px;
}

.answer-slot {
  flex: 1;
  min-width: 0;
}

.answer-button {
  width: 100%;
  min-height: 68px;
  background: var(--surface-2);
  color: var(--accent);
  border: 1px solid var(--border-strong);
  padding: 10px 8px;
  display: grid;
  place-items: center;
  gap: 2px;
}

.answer-button:disabled {
  color: rgba(237, 232, 223, 0.18);
  border-color: var(--border);
  cursor: not-allowed;
}

.answer-button.correct {
  background: var(--correct-dim);
  border-color: rgba(82, 227, 138, 0.33);
  color: var(--correct);
}

.answer-button.wrong {
  background: var(--error-dim);
  border-color: rgba(255, 107, 107, 0.33);
  color: var(--error);
}

.answer-button.revealed {
  background: var(--accent-dim);
  border-color: var(--accent-border);
  color: var(--accent);
}

.answer-short {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1;
}

.answer-full {
  color: var(--dim);
  font-size: 0.62rem;
  font-weight: 800;
  text-transform: uppercase;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.loading-line {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.stat-card {
  padding: 20px;
}

.stat-card-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
}

.overall-percent {
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 12vw, 3.5rem);
  font-weight: 800;
  line-height: 0.95;
}

.donut {
  width: 78px;
  height: 78px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--donut-color) calc(var(--pct) * 1%), var(--surface-3) 0);
  position: relative;
}

.donut::after {
  content: "";
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--surface-1);
  position: absolute;
}

.donut span {
  position: relative;
  z-index: 1;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 800;
}

.stat-row-card {
  padding: 14px 16px;
  display: grid;
  gap: 8px;
}

.interval-id {
  font-family: var(--font-mono);
  font-weight: 800;
}

.progress-track {
  height: 5px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface-3);
}

.progress-fill {
  height: 100%;
  background: var(--bar-color);
  border-radius: inherit;
}

.empty-state {
  color: var(--muted);
  text-align: center;
  padding: 70px 18px;
  line-height: 1.6;
}

.danger-button {
  min-height: 46px;
  color: rgba(255, 107, 107, 0.75);
  border: 1px solid rgba(255, 107, 107, 0.33);
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
  padding: 12px 16px;
}

.confirm-panel {
  background: var(--error-dim);
  border-color: rgba(255, 107, 107, 0.33);
  padding: 14px;
}

.confirm-row {
  gap: 8px;
  margin-top: 10px;
}

.confirm-row button {
  flex: 1;
}

.danger-solid {
  min-height: 42px;
  border-radius: var(--radius-sm);
  background: var(--error);
  color: white;
  cursor: pointer;
}

.spacer {
  visibility: hidden;
}

@media (max-width: 560px) {
  .app-shell {
    padding: 16px;
  }

  .topline {
    align-items: flex-start;
  }

  .logo-mark {
    width: 48px;
    height: 48px;
    border-radius: 15px;
  }

  .mode-card {
    padding: 16px;
    min-height: 108px;
  }

  .mode-icon {
    width: 42px;
    height: 42px;
  }

  .playback-grid {
    grid-template-columns: 1fr;
  }

  .game-toolbar {
    align-items: flex-start;
  }

  .stat-cluster {
    gap: 10px;
  }

  .answer-button {
    min-height: 64px;
  }
}