:root {
  color-scheme: light;
  --page-bg: #f4efe4;
  --page-ink: #153341;
  --muted: #5b7683;
  --panel: rgba(255, 251, 244, 0.92);
  --panel-strong: #ffffff;
  --line: rgba(21, 51, 65, 0.12);
  --shadow: 0 28px 72px rgba(24, 56, 70, 0.12);
  --accent: #ff8a4c;
  --accent-ink: #652d0f;
  --accent-soft: rgba(255, 138, 76, 0.16);
  --fan: #46c9d8;
  --fan-soft: rgba(70, 201, 216, 0.16);
  --gate: #f5c063;
  --gate-soft: rgba(245, 192, 99, 0.16);
  --canvas-border: rgba(255, 255, 255, 0.72);
  --font-ui: "Avenir Next", "Segoe UI Variable", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-ui);
  color: var(--page-ink);
  background:
    radial-gradient(circle at top left, rgba(255, 208, 167, 0.72), transparent 34%),
    radial-gradient(circle at right 12% top 12%, rgba(70, 201, 216, 0.18), transparent 28%),
    linear-gradient(180deg, #f9f4ea 0%, #f4efe4 100%);
}

a {
  color: inherit;
}

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

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  padding: 0.1rem 0.35rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(21, 51, 65, 0.14);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: inset 0 -1px 0 rgba(21, 51, 65, 0.08);
  font-size: 0.85rem;
}

.site-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: max(1.2rem, env(safe-area-inset-top)) 1.25rem max(1.25rem, env(safe-area-inset-bottom));
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.4rem;
  padding: 0.95rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 1.35rem;
  background: rgba(255, 251, 244, 0.75);
  backdrop-filter: blur(18px);
  box-shadow: 0 20px 44px rgba(21, 51, 65, 0.08);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
}

.site-brand-mark {
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 0.7rem;
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.95), transparent 40%),
    linear-gradient(135deg, #ff8a4c 0%, #46c9d8 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.5);
}

.site-brand-label,
.panel-label,
.eyebrow {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-brand-name {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
}

.site-links {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.site-links a,
.mini-link {
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  color: var(--page-ink);
  background: transparent;
}

.site-links a:hover,
.mini-link:hover {
  border-color: rgba(21, 51, 65, 0.16);
  background: rgba(255, 255, 255, 0.7);
}

.mini-link {
  cursor: pointer;
}

.page-shell {
  display: grid;
  gap: 1.35rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(320px, 0.95fr);
  gap: 1.2rem;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.canvas-card,
.brief-card,
.legend-card {
  border: 1px solid var(--line);
  border-radius: 1.6rem;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 1.7rem 1.85rem;
  background:
    linear-gradient(135deg, rgba(255, 138, 76, 0.14), transparent 36%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 249, 240, 0.88));
}

.hero-copy h1 {
  margin: 0.25rem 0 0.8rem;
  font-size: clamp(2.5rem, 4vw, 4.3rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.intro {
  margin: 0;
  max-width: 54rem;
  font-size: 1.08rem;
  line-height: 1.65;
  color: #35535f;
}

.intro-help {
  margin: 0.95rem 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.intro-install {
  min-height: 1.5rem;
}

.hero-panel {
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
  align-content: start;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(250, 246, 237, 0.92));
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.metric {
  padding: 0.9rem 0.95rem;
  border-radius: 1.1rem;
  background: var(--panel-strong);
  border: 1px solid rgba(21, 51, 65, 0.08);
}

.metric-label {
  display: block;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.metric-value {
  display: block;
  margin-top: 0.45rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.action-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.btn {
  min-height: 2.8rem;
  border: 1px solid rgba(21, 51, 65, 0.12);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.82);
  color: var(--page-ink);
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 14px 26px rgba(21, 51, 65, 0.1);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
  box-shadow: none;
}

.btn-strong {
  background: linear-gradient(135deg, var(--accent) 0%, #ffb066 100%);
  color: #fffaf5;
  border-color: rgba(255, 138, 76, 0.45);
}

.level-dots {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.level-dot {
  min-width: 2.4rem;
  min-height: 2.4rem;
  border-radius: 999px;
  border: 1px solid rgba(21, 51, 65, 0.12);
  background: rgba(255, 255, 255, 0.84);
  color: var(--page-ink);
  cursor: pointer;
}

.level-dot.is-current {
  background: linear-gradient(135deg, var(--fan) 0%, #86e8f0 100%);
  border-color: rgba(70, 201, 216, 0.32);
  color: #07343a;
}

.level-dot.is-locked {
  opacity: 0.38;
  cursor: not-allowed;
}

.status-copy {
  min-height: 1.3rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.stage-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.75fr);
  gap: 1.2rem;
  align-items: start;
}

.canvas-card {
  padding: 1rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(250, 247, 240, 0.88));
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1.15rem;
  border: 1px solid var(--canvas-border);
  background: linear-gradient(180deg, #123847 0%, #0d2b36 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
  touch-action: manipulation;
  cursor: crosshair;
}

.canvas-bottom-bar {
  display: grid;
  gap: 0.8rem;
  margin-top: 0.9rem;
}

.touch-tip {
  margin: 0;
  color: #35535f;
  line-height: 1.55;
}

.mobile-stage-panel {
  display: none;
  gap: 0.75rem;
  padding: 0.9rem;
  border-radius: 1.15rem;
  border: 1px solid rgba(21, 51, 65, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(249, 244, 235, 0.94));
}

.mobile-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.metric-compact {
  padding: 0.78rem 0.82rem;
  border-radius: 1rem;
}

.metric-value-compact {
  margin-top: 0.35rem;
  font-size: 1rem;
}

.level-dots-mobile {
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-bottom: 0.15rem;
  scrollbar-width: none;
}

.level-dots-mobile::-webkit-scrollbar {
  display: none;
}

.level-dots-mobile .level-dot {
  flex: 0 0 auto;
  min-width: 2.55rem;
  min-height: 2.55rem;
}

.status-copy-compact {
  min-height: 0;
  font-size: 0.95rem;
}

.canvas-actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.btn-compact {
  min-height: 2.9rem;
}

.brief-column {
  display: grid;
  gap: 1rem;
}

.brief-card,
.legend-card {
  padding: 1.15rem 1.2rem;
}

.brief-card h2 {
  margin: 0.2rem 0 0.65rem;
  font-size: 1.55rem;
  line-height: 1.05;
}

.brief-copy {
  margin: 0;
  color: #35535f;
  line-height: 1.7;
}

.legend-list {
  display: grid;
  gap: 0.8rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: #35535f;
  line-height: 1.45;
}

.swatch {
  width: 1.05rem;
  height: 1.05rem;
  border-radius: 999px;
  flex: 0 0 auto;
}

.swatch-core {
  background: linear-gradient(135deg, #ff8a4c 0%, #ffd09d 100%);
}

.swatch-pad {
  background: linear-gradient(135deg, #f5c063 0%, #ffe0a0 100%);
}

.swatch-fan {
  background: linear-gradient(135deg, #46c9d8 0%, #b9fbff 100%);
}

.swatch-gate {
  background: linear-gradient(135deg, #f8d178 0%, #f7ae45 100%);
}

.game-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.2rem 0.15rem 0;
  color: var(--muted);
}

.game-footer-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

@media (max-width: 1120px) {
  .hero,
  .stage-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .page-shell {
    display: flex;
    flex-direction: column;
  }

  .stage-shell {
    order: -1;
  }

  .site-shell {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }

  .site-nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.9rem;
  }

  .site-links {
    width: 100%;
    gap: 0.45rem;
    overflow-x: auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
    scrollbar-width: none;
  }

  .site-links::-webkit-scrollbar {
    display: none;
  }

  .site-links a,
  .mini-link {
    min-width: max-content;
  }

  .hero-copy {
    padding-bottom: 1.1rem;
  }

  .hero-panel {
    display: none;
  }

  .hero,
  .brief-column,
  .touch-tip {
    display: none;
  }

  .mobile-stage-panel {
    display: grid;
  }

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

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

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

  .game-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .site-shell {
    padding-top: max(0.75rem, env(safe-area-inset-top));
    padding-bottom: max(0.95rem, env(safe-area-inset-bottom));
  }

  .site-brand-label {
    display: none;
  }

  .site-brand-name {
    font-size: 0.95rem;
  }

  .site-links {
    gap: 0.45rem;
  }

  .site-links a,
  .mini-link {
    padding: 0.45rem 0.7rem;
  }

  .hero-copy,
  .hero-panel,
  .canvas-card,
  .brief-card,
  .legend-card {
    border-radius: 1.2rem;
  }

  .hero-copy {
    padding: 1.25rem;
  }

  .hero-panel,
  .brief-card,
  .legend-card {
    padding: 1rem;
  }

  .canvas-card {
    padding: 0.8rem;
  }

  .mobile-stage-panel {
    padding: 0.78rem;
  }

  .touch-tip {
    font-size: 0.94rem;
  }
}

html[data-display-mode="standalone"] .site-shell {
  padding-top: max(0.45rem, env(safe-area-inset-top));
  padding-right: max(0.45rem, env(safe-area-inset-right));
  padding-bottom: max(0.55rem, env(safe-area-inset-bottom));
  padding-left: max(0.45rem, env(safe-area-inset-left));
}

html[data-display-mode="standalone"] .page-shell {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

html[data-display-mode="standalone"] .stage-shell {
  order: -1;
}

html[data-display-mode="standalone"] .site-nav {
  margin-bottom: 0.75rem;
  padding: 0.7rem 0.85rem;
  border-radius: 1rem;
}

html[data-display-mode="standalone"] .site-brand-label {
  display: none;
}

html[data-display-mode="standalone"] .site-brand-name {
  font-size: 0.95rem;
}

html[data-display-mode="standalone"] .site-links {
  gap: 0.45rem;
}

html[data-display-mode="standalone"] .site-links a:not(:first-child),
html[data-display-mode="standalone"] .site-links button {
  display: none;
}

html[data-display-mode="standalone"] .hero {
  display: none;
}

html[data-display-mode="standalone"] .hero-copy {
  padding: 1rem 1.1rem;
}

html[data-display-mode="standalone"] .hero-panel {
  display: none;
}

html[data-display-mode="standalone"] .intro {
  font-size: 0.98rem;
  line-height: 1.5;
}

html[data-display-mode="standalone"] .intro-help {
  margin-top: 0.65rem;
  font-size: 0.92rem;
  line-height: 1.45;
}

html[data-display-mode="standalone"] .canvas-card,
html[data-display-mode="standalone"] .hero-copy,
html[data-display-mode="standalone"] .hero-panel,
html[data-display-mode="standalone"] .brief-card,
html[data-display-mode="standalone"] .legend-card {
  border-radius: 1.1rem;
}

html[data-display-mode="standalone"] .mobile-stage-panel {
  display: grid;
}

html[data-display-mode="standalone"] .brief-column {
  display: none;
}

html[data-display-mode="standalone"] .game-footer {
  display: none;
}