:root {
  color-scheme: light;
  --bg: #fff8f3;
  --bg-deep: #ebe8ff;
  --panel: rgba(255, 255, 255, 0.86);
  --panel-border: rgba(67, 89, 146, 0.16);
  --text: #30305f;
  --muted: #69698d;
  --accent: #ff9fba;
  --accent-strong: #8d79d6;
  --success: #2a9d8f;
  --danger: #d62828;
  --human: #35b06d;
  --cpu-red: #e63946;
  --cpu-blue: #457b9d;
  --shadow: 0 20px 50px rgba(27, 48, 84, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: ui-rounded, "Trebuchet MS", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  overscroll-behavior: none;
  background:
    radial-gradient(circle at top left, rgba(255, 183, 210, 0.34), transparent 32%),
    radial-gradient(circle at top right, rgba(126, 211, 194, 0.24), transparent 26%),
    linear-gradient(180deg, var(--bg), var(--bg-deep));
}

.world-bar {
  position: relative;
  z-index: 10;
  max-width: 1200px;
  min-height: 72px;
  margin: 0 auto clamp(12px, 2vw, 18px);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid rgba(87, 74, 139, 0.14);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 14px 35px rgba(80, 65, 133, 0.12);
  backdrop-filter: blur(14px);
}

.world-home {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  color: var(--text);
  text-decoration: none;
}

.world-arrow {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, #ff9fba, #8d79d6);
  font-size: 1.25rem;
  font-weight: 900;
}

.world-copy {
  display: grid;
  line-height: 1.05;
}

.world-copy strong {
  font-size: 1rem;
}

.world-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-weight: 700;
}

.world-friends {
  height: 54px;
  display: flex;
  align-items: flex-end;
  padding: 0 8px;
}

.world-friends img {
  width: 42px;
  height: 54px;
  object-fit: contain;
  object-position: center bottom;
  filter: drop-shadow(0 4px 4px rgba(56, 43, 95, 0.15));
}

.world-friends img + img {
  margin-left: -8px;
}

body {
  min-height: 100dvh;
  padding:
    max(14px, env(safe-area-inset-top))
    max(14px, env(safe-area-inset-right))
    max(14px, env(safe-area-inset-bottom))
    max(14px, env(safe-area-inset-left));
  -webkit-tap-highlight-color: transparent;
}

body[data-theme="rocket"] {
  --accent: #ff7a59;
  --accent-strong: #e85d04;
  background:
    radial-gradient(circle at 18% 10%, rgba(255, 122, 89, 0.22), transparent 28%),
    radial-gradient(circle at 82% 2%, rgba(69, 123, 157, 0.18), transparent 25%),
    linear-gradient(180deg, #fff7ed, #e8efff);
}

body[data-theme="jungle"] {
  --accent: #9ccc65;
  --accent-strong: #43a047;
  background:
    radial-gradient(circle at top left, rgba(67, 160, 71, 0.2), transparent 34%),
    radial-gradient(circle at bottom right, rgba(255, 183, 3, 0.16), transparent 26%),
    linear-gradient(180deg, #f5fff1, #e7f4ff);
}

body[data-theme="castle"] {
  --accent: #f6bd60;
  --accent-strong: #c77dff;
  background:
    radial-gradient(circle at 12% 12%, rgba(199, 125, 255, 0.18), transparent 30%),
    radial-gradient(circle at 88% 8%, rgba(246, 189, 96, 0.22), transparent 26%),
    linear-gradient(180deg, #fbf7ff, #edf2ff);
}

body[data-theme="ocean"] {
  --accent: #00b4d8;
  --accent-strong: #0077b6;
  background:
    radial-gradient(circle at top left, rgba(0, 180, 216, 0.2), transparent 32%),
    radial-gradient(circle at bottom right, rgba(42, 157, 143, 0.18), transparent 28%),
    linear-gradient(180deg, #f0fdff, #e7f0ff);
}

body[data-theme="dino"] {
  --accent: #a7c957;
  --accent-strong: #6a994e;
  background:
    radial-gradient(circle at 12% 10%, rgba(167, 201, 87, 0.22), transparent 30%),
    radial-gradient(circle at 86% 18%, rgba(230, 57, 70, 0.1), transparent 24%),
    linear-gradient(180deg, #fcfff2, #e8f5ff);
}

body[data-theme="space"] {
  --accent: #8ecae6;
  --accent-strong: #4361ee;
  background:
    radial-gradient(circle at 15% 14%, rgba(67, 97, 238, 0.2), transparent 28%),
    radial-gradient(circle at 80% 6%, rgba(255, 183, 3, 0.2), transparent 18%),
    linear-gradient(180deg, #f7f8ff, #e8f0ff);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
  border-radius: 14px;
  padding: 0.9rem 1.1rem;
  min-height: 48px;
  font-weight: 700;
  transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
}

button:hover:enabled {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(20, 33, 61, 0.14);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.app-shell {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.hero,
.race-board,
.question-card,
.leaderboard-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero {
  padding: clamp(18px, 3vw, 24px);
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.9fr);
  align-items: center;
  overflow: hidden;
}
.controls-card #creekside-math-race-guide { float:right; margin:-12px -4px -4px 8px; }
.winner-banner-inner #creekside-math-race-result { display:flex; justify-content:center; margin:-8px 0 4px; }
@media (max-width:640px) { .controls-card #creekside-math-race-guide { display:none!important; } }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0 0 8px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 0.95;
  margin-bottom: 12px;
}

.lead {
  max-width: 58ch;
  color: var(--muted);
  font-size: 1.05rem;
}

.controls-card {
  display: grid;
  gap: 10px;
  padding: 18px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 255, 0.88));
  border: 1px solid rgba(67, 89, 146, 0.14);
}

.controls-card label,
.question-label,
.section-title span,
.hint,
.track-header p,
.score-pill {
  color: var(--muted);
}

.nickname-row,
.input-row,
.track-header,
.section-title {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.nickname-row input,
.input-row input {
  flex: 1;
  min-width: 0;
}

input {
  border: 1px solid rgba(67, 89, 146, 0.22);
  background: rgba(255, 255, 255, 0.94);
  border-radius: 14px;
  padding: 0.95rem 1rem;
  outline: none;
  color: var(--text);
  min-height: 48px;
  font-size: 16px;
}

.mode-select {
  border: 1px solid rgba(67, 89, 146, 0.22);
  background: rgba(255, 255, 255, 0.94);
  border-radius: 14px;
  padding: 0.95rem 1rem;
  outline: none;
  color: var(--text);
  min-height: 48px;
  font-size: 16px;
  appearance: none;
}

input:focus {
  border-color: rgba(251, 133, 0, 0.7);
  box-shadow: 0 0 0 4px rgba(251, 133, 0, 0.14);
}

.mode-select:focus {
  border-color: rgba(251, 133, 0, 0.7);
  box-shadow: 0 0 0 4px rgba(251, 133, 0, 0.14);
}

.difficulty-toggle {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 6px;
  border: 1px solid rgba(67, 89, 146, 0.16);
  border-radius: 16px;
  background: rgba(67, 89, 146, 0.06);
}

.difficulty-toggle legend {
  grid-column: 1 / -1;
  padding: 0 4px 4px;
  color: var(--muted);
  font-size: 0.92rem;
}

.difficulty-toggle label {
  display: block;
  cursor: pointer;
}

.difficulty-toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.difficulty-toggle span {
  display: grid;
  min-height: 42px;
  place-items: center;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 800;
}

.difficulty-toggle input:checked + span {
  background: #fff;
  color: var(--text);
  box-shadow: 0 8px 18px rgba(20, 33, 61, 0.1);
}

.difficulty-toggle input:focus-visible + span {
  box-shadow: 0 0 0 4px rgba(251, 133, 0, 0.14);
}

#start-button,
#submit-button,
#play-again-button {
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: #fff;
}

.secondary-button {
  background: rgba(67, 89, 146, 0.1);
  color: var(--text);
}

.question-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 10px;
}

.race-board {
  padding: clamp(16px, 2.4vw, 20px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.track-viewport {
  flex: 1;
  min-height: 0;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.track-header {
  margin-bottom: 16px;
  align-items: flex-start;
}

.score-pill {
  background: rgba(67, 89, 146, 0.08);
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  white-space: nowrap;
}

.track-grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: clamp(6px, 1vw, 10px);
}

.track-cell {
  min-height: 90px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(245,247,255,0.96));
  border: 1px solid rgba(67, 89, 146, 0.1);
  padding: 8px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cell-label {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.racer-slot {
  position: relative;
  min-height: 42px;
}

.racer {
  position: absolute;
  inset: auto auto 0 0;
  display: none;
  flex-direction: column;
  align-items: center;
  width: 34px;
  height: 46px;
}

.racer.visible {
  display: flex;
}

.racer-human {
  left: 0;
}

.racer-cpu-red {
  left: 23%;
}

.racer-cpu-blue {
  left: 46%;
}

.racer-character {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center bottom;
  filter: drop-shadow(0 3px 2px rgba(42, 37, 75, 0.2));
}

.racer-body {
  position: relative;
}

.circle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--human);
  box-shadow: inset -3px -3px 0 rgba(255,255,255,0.18);
}

.square {
  width: 20px;
  height: 20px;
  border-radius: 5px;
}

.red {
  background: var(--cpu-red);
}

.blue {
  background: var(--cpu-blue);
}

.feet {
  display: flex;
  gap: 3px;
  margin-top: -1px;
}

.feet::before,
.feet::after {
  content: "";
  width: 5px;
  height: 10px;
  background: #3a3a3a;
  border-radius: 99px;
}

.play-area {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(14px, 2vw, 20px);
}

.question-card,
.leaderboard-card {
  padding: clamp(16px, 2.4vw, 20px);
}

.section-title {
  margin-bottom: 14px;
  align-items: baseline;
}

.section-title span {
  font-size: 0.92rem;
}

.question-label {
  margin-bottom: 10px;
}

.race-flair {
  display: inline-flex;
  width: fit-content;
  max-width: 100%;
  margin-bottom: 12px;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 183, 3, 0.16);
  border: 1px solid rgba(251, 133, 0, 0.16);
  font-size: 0.86rem;
  font-weight: 900;
  line-height: 1.25;
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: -4px 0 14px;
}

.quick-stats span {
  padding: 0.55rem 0.6rem;
  border-radius: 14px;
  background: rgba(67, 89, 146, 0.07);
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 900;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.coach-card {
  margin: -2px 0 12px;
  padding: 0.75rem 0.85rem;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(42, 157, 143, 0.12), rgba(42, 157, 143, 0.05));
  border: 1px solid rgba(42, 157, 143, 0.16);
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
  line-height: 1.35;
}

.race-status {
  display: grid;
  gap: 10px;
  margin-top: 16px;
  padding: 14px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(67, 89, 146, 0.08), rgba(67, 89, 146, 0.03));
  border: 1px solid rgba(67, 89, 146, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.race-status-title {
  font-size: 0.86rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.race-status-lane {
  display: grid;
  gap: 6px;
}

.race-status-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  font-size: 0.96rem;
}

.race-status-name {
  font-weight: 900;
}

.race-status-name.human {
  color: var(--human);
}

.race-status-name.cpu-red {
  color: var(--cpu-red);
}

.race-status-name.cpu-blue {
  color: var(--cpu-blue);
}

.race-status-value {
  color: var(--muted);
  text-align: right;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.race-progress-track {
  height: 16px;
  width: 100%;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(20, 33, 61, 0.1);
  box-shadow: inset 0 1px 3px rgba(20, 33, 61, 0.1);
}

.race-progress-fill {
  height: 100%;
  min-width: 14px;
  border-radius: inherit;
  transition: width 220ms ease;
  box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.08);
}

.race-progress-fill.human {
  background: linear-gradient(90deg, #2fd38f, #35b06d);
}

.race-progress-fill.cpu-red {
  background: linear-gradient(90deg, #ff7984, #e63946);
}

.race-progress-fill.cpu-blue {
  background: linear-gradient(90deg, #76b6ff, #457b9d);
}

.race-status-caption {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
}

.question-text {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
  line-height: 0.95;
}

.feedback {
  min-height: 1.5rem;
  margin-top: 12px;
  font-weight: 700;
}

.feedback.success {
  color: var(--success);
}

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

.feedback.hint {
  color: var(--cpu-blue);
}

.focus-card {
  margin-top: 12px;
  padding: 0.75rem 0.85rem;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(69, 123, 157, 0.11), rgba(69, 123, 157, 0.04));
  border: 1px solid rgba(69, 123, 157, 0.14);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
  line-height: 1.35;
}

.leaderboard {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.leaderboard li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  background: rgba(67, 89, 146, 0.05);
  border-radius: 16px;
  padding: 0.85rem 0.95rem;
}

.rank {
  font-weight: 900;
  color: var(--accent-strong);
}

.score-meta {
  color: var(--muted);
  font-size: 0.93rem;
}

.achievement-card {
  margin-top: 14px;
  padding: 0.9rem;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 183, 3, 0.13), rgba(255, 255, 255, 0.62));
  border: 1px solid rgba(251, 133, 0, 0.16);
  color: var(--muted);
  font-weight: 800;
}

.achievement-title {
  margin-bottom: 8px;
  color: var(--text);
  font-weight: 900;
}

.achievement-pill {
  display: inline-flex;
  margin: 3px 4px 3px 0;
  padding: 0.42rem 0.58rem;
  border-radius: 999px;
  background: #fff;
  color: var(--accent-strong);
  box-shadow: 0 6px 14px rgba(20, 33, 61, 0.08);
  font-size: 0.86rem;
}

.winner-banner {
  position: fixed;
  inset: 0;
  background: rgba(10, 18, 35, 0.46);
  display: grid;
  place-items: center;
  padding: 18px;
}

.winner-banner.hidden {
  display: none;
}

.winner-banner-inner {
  max-width: min(520px, calc(100vw - 28px));
  width: 100%;
  background: rgba(255, 255, 255, 0.97);
  border-radius: 28px;
  padding: 26px;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.2);
  text-align: center;
}

.winner-banner-inner h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 10px;
}

.winner-banner-inner p {
  color: var(--muted);
  margin-bottom: 18px;
}

.winner-actions {
  display: flex;
  justify-content: center;
}

@media (max-width: 900px) {
  .hero,
  .play-area {
    grid-template-columns: 1fr;
  }

  .track-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  body {
    padding:
      max(10px, env(safe-area-inset-top))
      max(10px, env(safe-area-inset-right))
      max(10px, env(safe-area-inset-bottom))
      max(10px, env(safe-area-inset-left));
  }

  .world-bar {
    min-height: 62px;
    margin-bottom: 10px;
    padding: 6px 10px;
    border-radius: 18px;
  }

  .world-copy small {
    display: none;
  }

  .world-friends {
    height: 48px;
  }

  .world-friends img {
    width: 33px;
    height: 48px;
  }

  .hero,
  .race-board,
  .question-card,
  .leaderboard-card {
    border-radius: 20px;
  }

  .app-shell {
    gap: 12px;
  }

  .hero {
    padding: 14px;
  }

  .hero h1 {
    font-size: clamp(1.8rem, 8vw, 2.4rem);
    margin-bottom: 8px;
  }

  .lead {
    font-size: 0.98rem;
    line-height: 1.4;
  }

  .controls-card {
    padding: 14px;
  }

  .race-board {
    display: none;
  }

  .play-area {
    order: 0;
  }

  .question-card {
    position: static;
  }

  body.game-active .hero,
  body.game-active .leaderboard-card {
    display: none;
  }

  body.game-active .question-card {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 14px;
  }

  body.game-active .question-label,
  body.game-active .race-flair,
  body.game-active .quick-stats,
  body.game-active .coach-card,
  body.game-active .focus-card {
    display: none;
  }

  .track-header {
    margin-bottom: 10px;
  }

  .track-header h2,
  .section-title h2 {
    font-size: 1.05rem;
  }

  .track-header p,
  .hint,
  .score-meta,
  .section-title span {
    font-size: 0.84rem;
  }

  .nickname-row,
  .input-row,
  .track-header,
  .section-title {
    flex-direction: column;
    align-items: stretch;
  }

  .score-pill {
    align-self: flex-start;
    padding: 0.45rem 0.7rem;
  }

  .question-text {
    font-size: clamp(1.7rem, 10vw, 2.6rem);
  }

  body.game-active .question-text {
    order: 1;
    margin: 0;
    font-size: clamp(2rem, 13vw, 3.2rem);
    line-height: 1.04;
    letter-spacing: -0.05em;
  }

  body.game-active .input-row {
    order: 2;
    gap: 8px;
  }

  body.game-active #answer-input {
    min-height: 54px;
    padding: 0.85rem 0.95rem;
  }

  body.game-active #submit-button {
    min-height: 52px;
  }

  body.game-active .feedback {
    order: 3;
    min-height: 0;
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.25;
  }

  body.game-active .question-actions {
    order: 4;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 0;
  }

  body.game-active .race-status {
    order: 5;
    display: grid;
    gap: 7px;
    margin-top: 0;
    padding: 10px;
    border-radius: 16px;
  }

  body.game-active .race-status-title {
    font-size: 0.72rem;
    letter-spacing: 0.1em;
  }

  body.game-active .race-status-lane {
    gap: 4px;
  }

  body.game-active .race-status-row {
    font-size: 0.78rem;
    line-height: 1.1;
  }

  body.game-active .race-progress-track {
    height: 8px;
  }

  body.game-active .race-status-caption {
    display: none;
  }

  .race-flair {
    display: flex;
    width: 100%;
  }

  .quick-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .quick-stats span,
  .coach-card,
  .focus-card {
    font-size: 0.8rem;
  }

  .race-status {
    padding: 10px;
    gap: 6px;
  }

  .race-status-title {
    font-size: 0.8rem;
  }

  .race-status-lane {
    gap: 5px;
  }

  .race-status-row {
    font-size: 0.88rem;
  }

  .race-progress-track {
    height: 14px;
  }

  .race-status-caption {
    font-size: 0.78rem;
  }

  .leaderboard li {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .leaderboard li strong {
    word-break: break-word;
  }

  #start-button,
  #submit-button,
  #play-again-button,
  #hint-button,
  #quit-button {
    width: 100%;
  }

  .question-actions {
    justify-content: stretch;
  }

}

body.game-active #creekside-math-race-guide{display:none!important}