:root {
  color-scheme: dark;
  --page-bg-top: #1d3758;
  --page-bg-bottom: #07101d;
  --panel: rgba(18, 35, 58, 0.82);
  --panel-strong: rgba(11, 23, 39, 0.88);
  --panel-edge: rgba(122, 170, 236, 0.2);
  --text: #edf4ff;
  --muted: #97aec8;
  --quiet: #6d829e;
  --left: #7bd6ff;
  --right: #ffb277;
  --accent: #d7ffb9;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, var(--page-bg-top) 0%, #11233a 28%, var(--page-bg-bottom) 74%),
    #050b15;
  color: var(--text);
  font-family: "Segoe UI", "Yu Gothic UI", sans-serif;
}

body {
  min-height: 100vh;
}

body.home-view {
  overflow: hidden;
}

body.home-view .page-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
  height: 100vh;
  padding: 12px 0;
}

body.home-view .page-main {
  display: grid;
  min-height: 0;
}

body.home-view .home-screen {
  min-height: 0;
  align-content: center;
}

.page-shell {
  width: min(1500px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 14px 0 12px;
  min-height: 100vh;
}

.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 24px;
  margin-bottom: 12px;
}

.brand-block {
  display: none;
}

.eyebrow,
.hero-kicker,
.section-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  font-weight: 700;
  color: var(--left);
}

#brand-title {
  margin: 6px 0 4px;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.brand-subtitle {
  margin: 0;
  max-width: 560px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.45;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-switch {
  display: inline-flex;
  padding: 6px;
  border-radius: 999px;
  background: rgba(8, 16, 28, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.lang-button,
.primary-button,
.secondary-button {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  transition:
    transform 120ms ease,
    opacity 120ms ease,
    background 120ms ease,
    color 120ms ease;
}

.lang-button {
  min-width: 46px;
  padding: 9px 12px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.lang-button.is-active {
  background: linear-gradient(135deg, rgba(123, 214, 255, 0.22), rgba(255, 178, 119, 0.18));
  color: var(--text);
}

.primary-button {
  padding: 12px 20px;
  background: linear-gradient(135deg, #8be1ff, #d6ff9d);
  color: #06111d;
  font-weight: 800;
}

.secondary-button {
  padding: 10px 16px;
  background: rgba(8, 16, 28, 0.74);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-weight: 700;
}

.lang-button:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.page-main {
  display: block;
}

.home-screen {
  display: grid;
  min-height: calc(100vh - 40px);
  place-items: center;
}

.hero-panel,
.info-card,
.game-toolbar,
.game-canvas-shell,
.result-panel {
  backdrop-filter: blur(18px);
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 380px);
  gap: 24px;
  width: min(1120px, calc(100vw - 48px));
  padding: 32px;
  border-radius: 28px;
  align-items: center;
}

.hero-copy h2 {
  margin: 0;
  max-width: none;
  font-size: clamp(64px, 9vw, 120px);
  line-height: 0.92;
  letter-spacing: -0.04em;
  white-space: normal;
}

.hero-body {
  display: none;
}

.hero-actions {
  margin-top: 22px;
}

.hero-aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.hero-kicker {
  display: none;
}

.sound-card {
  padding: 18px 18px 16px;
  border-radius: 22px;
  background: rgba(8, 16, 28, 0.54);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.setting-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(6, 14, 25, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.setting-row h3 {
  margin: 0;
  font-size: 16px;
}

.setting-note {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.setting-toggle {
  min-width: 82px;
  padding: 10px 14px;
  border: 0;
  border-radius: 999px;
  background: rgba(123, 214, 255, 0.18);
  color: var(--text);
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform 120ms ease,
    background 120ms ease,
    color 120ms ease;
}

.setting-toggle.is-on {
  background: linear-gradient(135deg, rgba(123, 214, 255, 0.9), rgba(214, 255, 157, 0.88));
  color: #06111d;
}

.setting-toggle:hover {
  transform: translateY(-1px);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.metric-card {
  min-height: 92px;
  padding: 14px 16px;
  border-radius: 20px;
  background: rgba(8, 16, 28, 0.54);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.metric-label {
  display: block;
  color: var(--quiet);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
}

.metric-value {
  display: block;
  margin-top: 10px;
  font-size: clamp(24px, 2vw, 34px);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.mini-history-card {
  min-height: 156px;
  padding: 16px 18px;
  border-radius: 22px;
  background: rgba(8, 16, 28, 0.54);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.home-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
}

.info-card {
  border-radius: 24px;
  padding: 20px 22px;
}

.feature-list {
  display: grid;
  gap: 14px;
  margin-top: 12px;
}

.feature-item h3,
.control-column h3 {
  margin: 0 0 4px;
  font-size: 18px;
  line-height: 1.15;
}

.feature-item p,
.arena-caption,
.history-empty,
.history-caption {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.controls-card ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14px;
}

.controls-card li {
  margin: 6px 0;
}

.controls-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 12px;
}

.history-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.history-list {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.history-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 14px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(8, 16, 28, 0.48);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.history-item strong {
  font-size: 18px;
}

.history-meta {
  color: var(--muted);
  font-size: 12px;
}

.history-score {
  text-align: right;
  grid-column: 2;
  grid-row: 1 / span 2;
}

.history-empty {
  margin-top: 12px;
}

.game-screen {
  display: grid;
  gap: 18px;
}

.game-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 22px;
  border-radius: 26px;
}

.game-canvas-shell {
  display: grid;
  place-items: center;
  padding: 18px;
  border-radius: 32px;
}

canvas {
  width: min(96vw, 1440px);
  height: auto;
  border-radius: 26px;
  background: transparent;
}

body.game-view {
  overflow: hidden;
}

body.game-view .page-shell {
  width: 100vw;
  min-height: 100vh;
  padding: 0;
}

body.game-view .site-header {
  display: none;
}

body.game-view .page-main,
body.game-view .game-screen {
  min-height: 100vh;
}

body.game-view .game-screen {
  gap: 0;
  padding: 10px;
  place-items: center;
}

body.game-view .game-toolbar {
  display: none;
}

body.game-view .game-canvas-shell {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

body.game-view canvas {
  width: min(96vw, calc((100vh - 20px) * 1.6), 1440px);
  max-height: calc(100vh - 20px);
}

.result-modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(3, 8, 15, 0.6);
  backdrop-filter: blur(10px);
  z-index: 20;
}

.result-panel {
  width: min(720px, calc(100vw - 40px));
  padding: 30px;
  border-radius: 30px;
}

.result-panel h2 {
  margin: 10px 0 12px;
  font-size: 44px;
  letter-spacing: -0.04em;
}

.result-body {
  margin: 0 0 22px;
  color: var(--muted);
  line-height: 1.7;
}

.result-highlight {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 10px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(123, 214, 255, 0.16), rgba(214, 255, 157, 0.18));
  border: 1px solid rgba(214, 255, 157, 0.34);
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  box-shadow: 0 0 24px rgba(214, 255, 157, 0.12);
}

.result-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.result-metric {
  padding: 18px 16px;
  border-radius: 22px;
  background: rgba(8, 16, 28, 0.56);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.result-metric span {
  display: block;
  color: var(--quiet);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
}

.result-metric strong {
  display: block;
  margin-top: 8px;
  font-size: 30px;
  letter-spacing: -0.04em;
}

.result-metric.is-highlight {
  border-color: rgba(214, 255, 157, 0.42);
  box-shadow:
    0 0 0 1px rgba(214, 255, 157, 0.08) inset,
    0 0 28px rgba(214, 255, 157, 0.14);
}

.result-actions {
  display: flex;
  gap: 12px;
  margin-top: 22px;
}

.hidden {
  display: none !important;
}

@media (max-width: 1480px) {
  .page-shell {
    width: min(1400px, calc(100vw - 24px));
  }

  .hero-panel {
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.9fr);
  }
}

@media (max-width: 1120px) {
  .page-shell {
    width: min(100vw - 20px, 1540px);
    padding-top: 14px;
  }

  .site-header,
  .hero-panel,
  .controls-columns,
  .game-toolbar,
  .result-actions {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .metrics-grid,
  .home-grid,
  .result-metrics {
    grid-template-columns: 1fr;
  }

  .home-screen {
    min-height: auto;
    place-items: stretch;
  }

  .hero-panel {
    width: auto;
    padding: 22px;
  }

  .hero-copy h2 {
    font-size: clamp(48px, 14vw, 82px);
  }

  .history-item {
    grid-template-columns: 1fr;
  }

  .history-score {
    text-align: left;
    grid-column: auto;
    grid-row: auto;
  }

  .hero-copy h2 {
    white-space: normal;
  }
}