:root {
  --danger: #ff6d7a;
  --warn: #ffd479;
  --shadow: 0 18px 42px rgba(0, 0, 0, 0.28);

  --text: color-mix(in srgb, white 92%, var(--accent) 8%);
  --muted: color-mix(in srgb, white 68%, var(--accent) 32%);

  --bg: color-mix(in srgb, black 94%, var(--accent) 6%);
  --panel: color-mix(in srgb, black 88%, var(--accent) 12%);
  --panel-2: color-mix(in srgb, black 86%, var(--accent) 14%);
  --panel-3: color-mix(in srgb, black 90%, var(--accent) 10%);

  --line: color-mix(in srgb, black 68%, var(--accent) 32%);
  --line-strong: color-mix(in srgb, black 54%, var(--accent) 46%);

  --highlight: var(--accent-2);
  --highlight-soft: color-mix(in srgb, transparent 84%, var(--highlight) 16%);

  --bg-glow-1: color-mix(in srgb, black 58%, var(--accent) 42%);
  --bg-glow-2: color-mix(in srgb, black 58%, var(--accent-2) 42%);

  --ui-bg-strong: color-mix(in srgb, black 72%, var(--accent) 28%);
  --ui-bg-strong-2: color-mix(in srgb, black 78%, var(--accent) 22%);
  --ui-bg-soft: color-mix(in srgb, black 88%, var(--accent) 12%);
  --ui-bg-soft-2: color-mix(in srgb, black 84%, var(--accent) 16%);

  --ui-border-strong: color-mix(in srgb, black 52%, var(--accent) 48%);
  --ui-border-soft: color-mix(in srgb, black 68%, var(--accent) 32%);
  --ui-border-seed: color-mix(in srgb, black 74%, var(--text) 26%);

  --ui-grid-path: color-mix(in srgb, black 82%, var(--accent) 18%);
  --ui-grid-rock: color-mix(in srgb, black 94%, var(--accent) 6%);
  --ui-grid-tile: color-mix(in srgb, black 88%, var(--accent) 12%);
  --ui-grid-line: color-mix(in srgb, black 72%, var(--accent) 28%);

  --ui-latched-base: color-mix(in srgb, black 68%, var(--accent) 32%);
  --ui-latched-wash-1: color-mix(in srgb, transparent 90%, var(--highlight) 10%);
  --ui-latched-wash-2: color-mix(in srgb, transparent 96%, var(--highlight) 4%);
  --ui-latched-ring: color-mix(in srgb, transparent 90%, var(--highlight) 10%);

  --ui-seed-bg: color-mix(in srgb, black 84%, var(--accent) 16%);
  --ui-seed-border: color-mix(in srgb, black 74%, var(--text) 26%);

  --ui-ghost-bg: var(--ui-bg-strong);
  --ui-ghost-border: var(--ui-border-strong);
  --ui-ghost-hover-border: var(--accent);

  --ui-disabled-opacity: 0.45;

  --ui-focus-ring: color-mix(in srgb, transparent 78%, var(--accent) 22%);
  --ui-primary-bg: linear-gradient(
    135deg,
    color-mix(in srgb, black 45%, var(--accent-2) 55%),
    var(--accent-2)
  );
  --ui-primary-text: color-mix(in srgb, black 88%, var(--accent-2) 12%);
  --ui-primary-ring: color-mix(in srgb, transparent 84%, var(--accent-2) 16%);

  --ui-surface-hud: color-mix(in srgb, black 84%, var(--panel-2) 16%);
  --ui-surface-canvas: color-mix(in srgb, black 86%, var(--panel) 14%);

  --ui-tower-active-bg: linear-gradient(
    135deg,
    color-mix(in srgb, black 42%, var(--accent) 58%),
    color-mix(in srgb, white 12%, var(--accent) 88%)
  );
  --ui-tower-active-ring: color-mix(in srgb, transparent 86%, var(--accent) 14%);
}

main.shell,
main.shell * {
  -webkit-user-select: none;
  user-select: none;
}

button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text);
  font: inherit;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  opacity: 0;
  animation: rise 600ms ease-out forwards;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex-wrap: wrap;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  margin: 0;
  padding: 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.breadcrumb a {
  color: var(--accent-2);
  text-decoration: none;
  font-weight: 600;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb span {
  color: var(--muted);
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.topbar-btn {
  padding: 5px 10px;
  border-radius: 9px;
  font-size: 12px;
  line-height: 1;
  min-height: 28px;
}

.topbar-seed {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  min-height: 24px;
  padding: 4px 9px;
  border: 1px solid var(--ui-seed-border);
  border-radius: 999px;
  background: var(--ui-seed-bg);
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.topbar-actions .topbar-btn.latched {
  background:
    linear-gradient(180deg, var(--ui-latched-wash-1), var(--ui-latched-wash-2)),
    var(--ui-latched-base);
  border-color: var(--highlight);
  color: var(--text);
  box-shadow: 0 0 0 2px var(--ui-latched-ring);
}

.stat {
  min-width: 92px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--panel-3);
  padding: 8px;
}

.stat span {
  display: block;
  font-size: 12px;
  color: var(--muted);
}

.stat strong {
  font-size: 18px;
}

body {
  -webkit-touch-callout: none;
}

@media (max-width: 680px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .topbar-left {
    width: 100%;
    justify-content: space-between;
  }

  .topbar-actions {
    width: 100%;
  }

  .topbar-actions button {
    flex: 1 1 0;
    min-width: 0;
  }

  .topbar-seed {
    min-width: 0;
    justify-content: center;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}