html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg-page);
  color: var(--text-body);
  font-family: ui-sans-serif, system-ui, sans-serif;
  overflow: hidden;
  /* Prevent iOS Safari and Chrome Mobile from auto-scaling long paragraphs
     (heuristic that picks up About scales and inflates the text). */
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

#app {
  position: fixed;
  inset: 0;
}

.hud {
  position: fixed;
  top: 16px;
  right: 16px;
  bottom: 16px;
  width: 360px;
  padding: 22px 24px;
  box-sizing: border-box;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--bg-panel);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-1);
  border-radius: 14px;
  font-size: 15px;
  line-height: 1.55;
  transition:
    transform 220ms ease,
    opacity 220ms ease;
}
.hud--collapsed {
  transform: translateX(calc(100% + 24px));
  opacity: 0;
  pointer-events: none;
}
.hud::-webkit-scrollbar {
  width: 6px;
}
.hud::-webkit-scrollbar-thumb {
  background: var(--border-1);
  border-radius: 3px;
}
.hud::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

.hud-head {
  padding-bottom: 6px;
}
.hud-head h1 {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}
.hud-head .lead {
  margin: 0 0 18px;
  color: var(--text-lead);
  font-size: 13.5px;
}

.floating-controls {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 8px;
}
.floating-btn {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 50%;
  background: var(--bg-panel-strong);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-3);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 120ms ease;
}
.floating-btn:hover {
  background: var(--accent-bg-strong);
}
.floating-btn svg {
  width: 18px;
  height: 18px;
}
.floating-btn .icon-play {
  display: none;
}
.floating-btn.is-paused .icon-pause {
  display: none;
}
.floating-btn.is-paused .icon-play {
  display: block;
}

.hud-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--bg-panel-strong);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-3);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  /* Default state = HUD collapsed: chevron points left ("open me leftward"). */
  transform: rotate(180deg);
  transition:
    transform 220ms ease,
    background 120ms ease;
}
.hud-toggle svg {
  width: 16px;
  height: 16px;
}
.hud-toggle:hover {
  background: var(--accent-bg-strong);
}
.hud-toggle--shown {
  /* HUD visible: chevron points right ("close me rightward"). */
  transform: translateX(-376px);
}

.section {
  background: var(--surface-1);
  border: 1px solid var(--surface-3);
  border-radius: 10px;
  margin-bottom: 10px;
  overflow: hidden;
  transition:
    background 150ms ease,
    border-color 150ms ease;
}
.section:last-of-type {
  margin-bottom: 0;
}
.section[open] {
  background: var(--surface-3);
  border-color: var(--accent-border-soft);
}
.section > summary {
  cursor: pointer;
  padding: 14px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  list-style: none;
  display: flex;
  align-items: center;
  user-select: none;
  transition: color 120ms ease;
}
.section > summary:hover {
  color: var(--accent-lighter);
}
.section > summary::-webkit-details-marker {
  display: none;
}
.section > summary::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 8px;
  flex-shrink: 0;
  background-color: var(--text-lead);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='9 6 15 12 9 18'/></svg>") center / contain no-repeat;
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='9 6 15 12 9 18'/></svg>") center / contain no-repeat;
  transform: rotate(0deg);
  transition: transform 150ms ease;
}
.section[open] > summary::before {
  transform: rotate(90deg);
}
.section-body {
  padding: 6px 16px 18px 16px;
}

/* The Planets section lives inside the HUD; on desktop it is hidden in favour
   of the fixed top-left legend card, on mobile it replaces that card. */
.section--legend {
  display: none;
}

.field {
  margin-bottom: 18px;
}
.field:last-child {
  margin-bottom: 4px;
}
.field-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}
.label {
  font-size: 13.5px;
  color: var(--text-secondary);
}
.val {
  color: var(--text-strong);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  height: 4px;
}

.hud .hint {
  font-size: 13px;
  color: var(--text-hint);
  margin-top: 6px;
  line-height: 1.55;
}

.presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}
button {
  padding: 9px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-2);
  background: var(--surface-2);
  color: var(--text-button);
  font-size: 13.5px;
  cursor: pointer;
  transition: background 120ms;
}
button:hover {
  background: var(--accent-bg);
  border-color: var(--accent-border-strong);
}
button.golden {
  color: var(--golden);
  border-color: var(--golden-border);
  background: var(--golden-bg);
}
button.golden:hover {
  background: var(--golden-bg-hover);
}
button.danger {
  color: var(--danger);
  border-color: var(--danger-border);
  background: var(--danger-bg);
}
button.danger:hover {
  background: var(--danger-bg-hover);
}
button.wide {
  width: 100%;
  margin-top: 8px;
}

.toggles {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 8px;
}
.toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  color: var(--text-body);
  cursor: pointer;
  padding: 4px 0;
  border-bottom: 1px solid var(--surface-2);
}
.toggle:last-child {
  border-bottom: none;
}
.toggle input {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

.diagnostics {
  font-size: 13px;
  color: var(--text-diagnostics);
  line-height: 1.85;
}
.diagnostics span {
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}
#consumedList {
  color: var(--danger);
  margin-top: 4px;
}

.about p,
.section-body > p {
  margin: 10px 0;
  line-height: 1.6;
  font-size: 13px;
  color: var(--text-about);
}
.section-body > p:first-child {
  margin-top: 0;
}
.section-body > p:last-child {
  margin-bottom: 14px;
}
.about b,
.section-body > p b {
  color: var(--text-primary);
  font-weight: 600;
}

/* Inline cheat-sheet for KAM presets — small list of descriptions below the
   preset buttons so users don't need to hover for tooltips. */
.presets-key {
  list-style: none;
  padding: 0;
  margin: 14px 0 4px 0;
  font-size: 13px;
  color: var(--text-about);
  line-height: 1.6;
}
.presets-key li {
  margin-bottom: 7px;
}
.presets-key li:last-child {
  margin-bottom: 0;
}
.presets-key b {
  color: var(--text-primary);
  font-weight: 600;
}
.presets-key em {
  font-style: italic;
  color: var(--text-secondary);
}

/* The fixed top-left legend card (desktop) and the in-HUD .legend-rows block
   (mobile) share row, dot, name, and meta styling. Only the container styles
   differ — fixed positioning lives on .legend only. */
.legend {
  position: fixed;
  left: 16px;
  top: 16px;
  padding: 14px 16px;
  background: var(--bg-panel-soft);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-1);
  border-radius: 12px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-body);
}
.legend-rows {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-body);
}
.legend .row,
.legend-rows .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.legend .row-left,
.legend-rows .row-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.legend .dot,
.legend-rows .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.legend .meta,
.legend-rows .meta {
  color: var(--text-meta);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}
.legend-note,
.legend-rows .legend-note {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--surface-2);
  font-size: 12.5px;
  color: var(--text-hint);
  line-height: 1.5;
  max-width: 280px;
}
.legend-note sup {
  font-size: 10px;
}

.hint-bottom {
  position: fixed;
  left: 16px;
  bottom: 16px;
  font-size: 12.5px;
  color: var(--text-faint);
  pointer-events: none;
}

.hud-footer {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--surface-2);
  font-size: 11.5px;
  color: var(--text-faint);
  text-align: center;
  line-height: 1.5;
}
.hud-footer a {
  color: var(--text-hint);
  text-decoration: none;
  transition: color 120ms ease;
}
.hud-footer a:hover {
  color: var(--accent-light);
  text-decoration: underline;
}

/* Mobile: HUD becomes a bottom sheet, sliders and buttons get larger touch
   targets. Below 768px we assume touch input and limited horizontal space. */
@media (max-width: 768px) {
  .hud {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-height: 72vh;
    padding: 22px 20px 24px;
    border-radius: 16px 16px 0 0;
    border-bottom: none;
    font-size: 16px;
  }
  .hud--collapsed {
    transform: translateY(100%);
  }

  .hud-toggle {
    top: auto;
    bottom: 20px;
    right: 20px;
    width: 52px;
    height: 52px;
    /* Mobile collapsed state: chevron points up ("open me upward"). */
    transform: rotate(-90deg);
  }
  .hud-toggle svg {
    width: 22px;
    height: 22px;
  }
  .hud-toggle--shown {
    /* HUD visible below: chevron points down ("close me downward"). */
    transform: translateY(calc(-72vh + 12px)) rotate(90deg);
  }

  /* Show in-HUD legend, hide the fixed top-left card */
  .section--legend {
    display: block;
  }
  .legend {
    display: none;
  }

  /* Larger touch-friendly sliders */
  input[type="range"] {
    height: 6px;
  }
  input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
  }
  input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
  }

  .toggle {
    padding: 10px 0;
    font-size: 15px;
  }
  .toggle input {
    width: 22px;
    height: 22px;
  }

  button {
    padding: 12px 14px;
    font-size: 15px;
    min-height: 44px;
  }

  .section > summary {
    padding: 16px;
    font-size: 14px;
  }

  .hint-bottom {
    display: none;
  }

  /* Larger floating controls for touch */
  .floating-btn {
    width: 48px;
    height: 48px;
  }
  .floating-btn svg {
    width: 24px;
    height: 24px;
  }
}