:root {
  --game-bg: #07111f;
  --game-surface: rgba(12, 22, 38, 0.88);
  --game-card: rgba(255, 255, 255, 0.1);
  --game-ink: #fff8e8;
  --game-muted: rgba(255, 248, 232, 0.74);
  --game-primary: #7c5cff;
  --game-secondary: #16d6ff;
  --game-accent: #ffd166;
  --game-good: #51f2a8;
  --game-danger: #ff6b7a;
  --game-line: rgba(255, 255, 255, 0.16);
  --game-shadow: 0 30px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 5%, rgba(124, 92, 255, 0.34), transparent 30rem),
    radial-gradient(circle at 86% 8%, rgba(255, 209, 102, 0.26), transparent 28rem),
    linear-gradient(135deg, var(--game-bg), #050611 72%);
  color: var(--game-ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

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

.game-shell {
  margin: 0 auto;
  padding: 24px 0 60px;
  width: min(1240px, calc(100% - 28px));
}

.site-switcher {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  margin-bottom: 16px;
}

.site-switcher a,
.primary-link {
  text-decoration: none;
}

.site-switcher a {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--game-line);
  border-radius: 999px;
  color: var(--game-ink);
  font-size: 0.88rem;
  font-weight: 900;
  padding: 8px 12px;
}

.site-switcher a[aria-current="page"] {
  background: var(--game-ink);
  color: var(--game-bg);
}

.game-hero,
.mode-lab,
.game-stage,
.source-panel,
.session-card {
  background: var(--game-surface);
  border: 1px solid var(--game-line);
  border-radius: 32px;
  box-shadow: var(--game-shadow);
  overflow: hidden;
}

.game-hero {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) 390px;
  margin-bottom: 16px;
}

.hero-copy {
  padding: clamp(28px, 5vw, 58px);
}

.eyebrow {
  color: var(--game-accent);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.14em;
  margin-bottom: 10px;
  text-transform: uppercase;
}

h1,
h2 {
  letter-spacing: -0.06em;
  line-height: 0.98;
}

h1 {
  font-size: clamp(2.65rem, 7vw, 6.4rem);
  max-width: 920px;
}

h2 {
  font-size: clamp(1.8rem, 3.2vw, 3rem);
}

h3 {
  font-size: clamp(1.35rem, 3vw, 2.25rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.lead,
.mode-lab p:not(.eyebrow),
.session-card p:not(.eyebrow),
.control-note,
#gameSubtitle {
  color: var(--game-muted);
}

.lead {
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  line-height: 1.45;
  margin-top: 18px;
  max-width: 820px;
}

.hero-actions,
.stage-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-actions {
  margin-top: 24px;
}

.control-card {
  background: rgba(255, 255, 255, 0.09);
  border-left: 1px solid var(--game-line);
  padding: 24px;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 900;
  margin-top: 14px;
}

label:first-child {
  margin-top: 0;
}

input,
select,
textarea {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--game-line);
  border-radius: 16px;
  color: var(--game-ink);
  min-height: 46px;
  padding: 11px 12px;
  width: 100%;
}

select option {
  color: #111827;
}

textarea {
  line-height: 1.35;
  resize: vertical;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(255, 209, 102, 0.7);
  outline-offset: 2px;
}

.primary-button,
.primary-link,
.secondary-button,
.mode-card,
.answer-grid button,
.memory-card,
.target {
  border: 0;
  font-weight: 950;
}

.primary-button,
.primary-link {
  background: linear-gradient(135deg, var(--game-primary), var(--game-secondary));
  border-radius: 18px;
  color: #fff;
  display: inline-flex;
  justify-content: center;
  margin-top: 16px;
  padding: 13px 16px;
  width: 100%;
}

.hero-actions .primary-link {
  margin-top: 0;
  width: auto;
}

.primary-button:disabled {
  cursor: wait;
  opacity: 0.62;
}

.secondary-button {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--game-line);
  border-radius: 999px;
  color: var(--game-ink);
  padding: 10px 13px;
}

.secondary-button:hover,
.answer-grid button:hover,
.memory-card:hover,
.target:hover {
  background: rgba(255, 255, 255, 0.2);
}

.control-note {
  font-size: 0.92rem;
  font-weight: 750;
  line-height: 1.35;
  margin-top: 10px;
}

.mode-lab,
.session-card {
  align-items: center;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 0.8fr) minmax(420px, 1.2fr);
  margin-bottom: 16px;
  padding: 24px;
}

.source-panel {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 0.7fr);
  margin-bottom: 16px;
  padding: 24px;
}

.source-panel p:not(.eyebrow) {
  color: var(--game-muted);
  line-height: 1.45;
  margin-top: 10px;
}

.source-form {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--game-line);
  border-radius: 24px;
  padding: 18px;
}

.source-form input[type="file"] {
  min-height: auto;
}

.mode-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.mode-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--game-line);
  border-radius: 20px;
  color: var(--game-ink);
  min-height: 130px;
  padding: 14px;
  text-align: left;
}

.mode-card[aria-checked="true"] {
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.78), rgba(22, 214, 255, 0.45));
  border-color: rgba(255, 255, 255, 0.44);
}

.mode-card strong,
.mode-card span {
  display: block;
}

.mode-card span {
  color: var(--game-muted);
  font-size: 0.86rem;
  line-height: 1.32;
  margin-top: 8px;
}

.score-strip {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 16px;
}

.score-strip article {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--game-line);
  border-radius: 22px;
  padding: 16px;
}

.score-strip span {
  color: var(--game-muted);
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.score-strip strong {
  display: block;
  font-size: clamp(1.4rem, 3vw, 2.25rem);
  line-height: 1;
  margin-top: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stage-head {
  align-items: center;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  padding: 22px;
}

.play-area {
  background:
    radial-gradient(circle at 20% 0, rgba(255, 209, 102, 0.2), transparent 20rem),
    linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(0, 0, 0, 0.14));
  border-top: 1px solid var(--game-line);
  min-height: 520px;
  padding: 22px;
}

.boss-layout,
.race-layout,
.tower-layout {
  align-items: stretch;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(240px, 0.65fr) minmax(0, 1fr);
}

.boss-card,
.race-track,
.tower,
.question-card,
.memory-card {
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid var(--game-line);
  border-radius: 28px;
}

.boss-card {
  align-content: center;
  display: grid;
  gap: 12px;
  justify-items: center;
  min-height: 330px;
  padding: 22px;
  text-align: center;
}

.boss-face {
  align-items: center;
  background: linear-gradient(135deg, var(--game-accent), var(--game-secondary));
  border-radius: 34px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
  display: flex;
  font-size: 5rem;
  height: 150px;
  justify-content: center;
  width: 150px;
}

.hp {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  height: 18px;
  overflow: hidden;
  width: min(280px, 100%);
}

.hp i {
  background: linear-gradient(90deg, var(--game-danger), var(--game-accent));
  display: block;
  height: 100%;
  transition: width 180ms ease;
}

.question-card {
  padding: clamp(18px, 4vw, 34px);
}

.answer-grid {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.answer-grid button {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--game-line);
  border-radius: 18px;
  color: var(--game-ink);
  padding: 15px;
  text-align: left;
}

.answer-grid button.wrong {
  background: rgba(255, 107, 122, 0.28);
  border-color: var(--game-danger);
}

.race-track {
  min-height: 330px;
  overflow: hidden;
  padding: 34px 20px;
  position: relative;
}

.race-track::before {
  background: rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  content: "";
  height: 12px;
  left: 30px;
  position: absolute;
  right: 30px;
  top: 50%;
}

.race-track i {
  align-items: center;
  background: #1b2740;
  border: 2px solid var(--game-line);
  border-radius: 999px;
  display: inline-flex;
  height: 42px;
  justify-content: center;
  margin-right: calc((100% - 250px) / 4);
  position: relative;
  top: calc(50% - 18px);
  width: 42px;
  z-index: 1;
}

.race-track i.done,
.race-track i.active {
  background: var(--game-accent);
  color: #172033;
}

.runner {
  font-size: 3.2rem;
  position: absolute;
  top: calc(50% - 82px);
  transition: left 180ms ease;
  z-index: 2;
}

.memory-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.memory-card {
  color: var(--game-ink);
  min-height: 132px;
  padding: 14px;
}

.memory-card.selected {
  background: rgba(255, 209, 102, 0.24);
  border-color: var(--game-accent);
}

.memory-card.matched {
  background: rgba(81, 242, 168, 0.2);
  border-color: var(--game-good);
}

.target-arena {
  min-height: 520px;
  position: relative;
}

.target-arena .question-card {
  bottom: 18px;
  left: 50%;
  max-width: 720px;
  position: absolute;
  transform: translateX(-50%);
  width: min(720px, calc(100% - 24px));
  z-index: 2;
}

.target {
  align-items: center;
  background: radial-gradient(circle at 35% 25%, white, var(--game-accent) 20%, var(--game-primary));
  border: 2px solid rgba(255, 255, 255, 0.65);
  border-radius: 999px;
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.34);
  color: #fff;
  display: flex;
  font-size: 1.3rem;
  height: 86px;
  justify-content: center;
  position: absolute;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  width: 86px;
}

.target.popped {
  background: rgba(81, 242, 168, 0.22);
}

.tower {
  align-content: end;
  display: grid;
  gap: 8px;
  justify-items: center;
  min-height: 390px;
  padding: 24px;
}

.tower i {
  align-items: center;
  background: linear-gradient(135deg, var(--game-primary), var(--game-secondary));
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 18px;
  display: flex;
  font-size: 1.8rem;
  font-style: normal;
  height: 58px;
  justify-content: center;
  width: min(250px, 90%);
}

.session-card pre {
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--game-line);
  border-radius: 22px;
  color: #fdf6de;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.45;
  margin: 0;
  max-height: 360px;
  overflow: auto;
  padding: 16px;
}

@media (max-width: 980px) {
  .game-hero,
  .mode-lab,
  .source-panel,
  .session-card,
  .boss-layout,
  .race-layout,
  .tower-layout {
    grid-template-columns: 1fr;
  }

  .control-card {
    border-left: 0;
    border-top: 1px solid var(--game-line);
  }

  .mode-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .memory-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .game-shell {
    padding-top: 14px;
    width: min(100% - 18px, 1240px);
  }

  .site-switcher {
    justify-content: flex-start;
  }

  .game-hero,
  .mode-lab,
  .game-stage,
  .source-panel,
  .session-card {
    border-radius: 24px;
  }

  .hero-copy,
  .control-card,
  .mode-lab,
  .source-panel,
  .stage-head,
  .play-area,
  .session-card {
    padding: 16px;
  }

  .hero-actions,
  .stage-head {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .primary-link,
  .secondary-button {
    justify-content: center;
    text-align: center;
    width: 100%;
  }

  .mode-grid,
  .score-strip {
    grid-template-columns: 1fr 1fr;
  }

  .score-strip article {
    padding: 12px;
  }

  .play-area,
  .target-arena {
    min-height: 620px;
  }

  .target {
    height: 72px;
    width: 72px;
  }

  .race-track i {
    margin-right: 8px;
  }
}