:root {
  color-scheme: dark;
  --bg: #080b10;
  --bg-soft: rgba(13, 18, 26, 0.72);
  --panel: rgba(13, 18, 26, 0.88);
  --line: rgba(221, 229, 240, 0.13);
  --line-strong: rgba(221, 229, 240, 0.24);
  --text: #edf1f5;
  --muted: #9099a7;
  --faint: #626b79;
  --warm: #f4d8a4;
  --radius: 14px;
  --font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

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

.app {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 480px;
  isolation: isolate;
  background:
    radial-gradient(circle at 50% 44%, rgba(29, 39, 53, 0.16), transparent 42%),
    linear-gradient(180deg, #090d13 0%, #070a0f 100%);
}

#space {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

#space.dragging { cursor: grabbing; }

.glass-edge,
.glass-panel {
  border: 1px solid var(--line);
  background: var(--bg-soft);
  box-shadow: 0 16px 46px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(18px) saturate(110%);
  -webkit-backdrop-filter: blur(18px) saturate(110%);
}

.masthead {
  position: absolute;
  z-index: 3;
  top: max(22px, env(safe-area-inset-top));
  left: max(22px, env(safe-area-inset-left));
  display: flex;
  align-items: center;
  gap: 18px;
  min-width: 190px;
  padding: 13px 14px 13px 16px;
  border-radius: var(--radius);
}

h1, h2, p { margin: 0; }

.masthead h1 {
  font-size: 15px;
  font-weight: 570;
  letter-spacing: 0.015em;
}

.masthead p,
.eyebrow {
  margin-top: 3px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.icon-button,
.transport-button,
.text-button,
.action-button {
  border: 0;
  background: transparent;
  cursor: pointer;
}

.icon-button {
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  transition: 180ms ease;
}

.icon-button:hover,
.icon-button:focus-visible {
  border-color: var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.045);
}

.icon-button.small { width: 28px; height: 28px; }

[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  z-index: 12;
  right: 0;
  bottom: calc(100% + 9px);
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 10px 28px rgba(0, 0, 0, .24);
  color: var(--text);
  font-size: 9px;
  font-weight: 570;
  letter-spacing: .02em;
  line-height: 1;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateY(3px);
  transition: opacity 120ms ease 0ms, transform 120ms ease 0ms;
}
[data-tooltip]:hover::after,
[data-tooltip]:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 500ms;
}

.date-readout {
  position: absolute;
  z-index: 3;
  top: max(22px, env(safe-area-inset-top));
  right: max(22px, env(safe-area-inset-right));
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 9px;
  width: 200px;
  padding: 14px 16px;
  border-radius: var(--radius);
  color: var(--text);
  white-space: nowrap;
  cursor: pointer;
}

#dateMain {
  font-size: 12px;
  font-weight: 570;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.model-note {
  position: absolute;
  z-index: 3;
  left: max(22px, env(safe-area-inset-left));
  bottom: calc(max(22px, env(safe-area-inset-bottom)) + 62px);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 11px;
  border-radius: 10px;
  color: var(--faint);
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.status-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #9cb5a7;
  box-shadow: 0 0 9px rgba(156, 181, 167, 0.5);
}

.view-controls {
  position: absolute;
  z-index: 3;
  right: max(22px, env(safe-area-inset-right));
  bottom: calc(max(22px, env(safe-area-inset-bottom)) + 62px);
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 7px;
  border-radius: 12px;
}

.compact-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.compact-toggle span,
.text-button {
  display: block;
  padding: 7px 9px;
  border-radius: 8px;
  color: var(--faint);
  font-size: 9px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: 180ms ease;
  cursor: pointer;
}

#scaleButton {
  width: 100px;
  text-align: center;
  white-space: nowrap;
}

.compact-toggle input:checked + span,
.compact-toggle:hover span,
.compact-toggle input:focus-visible + span,
.text-button:hover,
.text-button:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.045);
}

.compact-toggle input:checked + span {
  box-shadow: 0 0 12px rgba(126, 214, 153, 0.18), inset 0 0 0 1px rgba(126, 214, 153, 0.08);
}

.timeline {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: max(22px, env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  gap: 5px;
  transform: translateX(-50%);
  padding: 7px;
  border-radius: 15px;
}

.transport-button {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px;
  color: var(--muted);
  font-size: 16px;
  transition: 180ms ease;
}

.transport-button:hover,
.transport-button:focus-visible { color: var(--text); background: rgba(255,255,255,.05); }
.transport-button.primary { color: var(--text); background: rgba(255,255,255,.07); }
.transport-button.active { color: var(--warm); background: rgba(244, 216, 164, 0.08); }

.divider { width: 1px; height: 22px; margin: 0 3px; background: var(--line); }

.speed-label select {
  width: 124px;
  padding: 8px 25px 8px 9px;
  border: 0;
  border-radius: 8px;
  outline: 0;
  background: rgba(255,255,255,.035);
  color: var(--muted);
  font-size: 10px;
  font-weight: 570;
  cursor: pointer;
}

.speed-label select:focus-visible { box-shadow: 0 0 0 2px rgba(230, 235, 241, 0.3); }
.text-button.strong { color: var(--text); }

.planet-card {
  position: absolute;
  z-index: 5;
  top: 50%;
  right: max(22px, env(safe-area-inset-right));
  width: min(300px, calc(100vw - 44px));
  padding: 20px;
  border-radius: 18px;
  transform: translateY(-50%);
}

.planet-card[hidden] { display: none; }
.card-close { position: absolute; top: 12px; right: 12px; border: 0; }

.planet-heading { display: flex; align-items: center; gap: 13px; padding-right: 32px; }
.planet-swatch { width: 11px; height: 11px; border-radius: 50%; box-shadow: 0 0 14px currentColor; }
.planet-heading h2 { margin-top: 2px; font-size: 24px; font-weight: 470; letter-spacing: -0.025em; }

.metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 15px 12px; margin: 22px 0 20px; }
.metrics div { min-width: 0; }
.metrics dt { color: var(--faint); font-size: 8px; font-weight: 650; letter-spacing: .11em; text-transform: uppercase; }
.metrics dd { margin: 5px 0 0; color: #dfe5eb; font-size: 12px; font-variant-numeric: tabular-nums; }
.card-actions { display: flex; gap: 8px; }

.action-button {
  min-height: 37px;
  padding: 0 15px;
  border-radius: 10px;
  background: #e7ebef;
  color: #10141a;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.action-button.muted { background: rgba(255,255,255,.06); color: var(--muted); }
.action-button:hover { filter: brightness(1.06); }

.modal {
  width: min(430px, calc(100vw - 32px));
  padding: 0;
  border-radius: 20px;
  color: var(--text);
}

.modal::backdrop { background: rgba(2, 4, 7, 0.68); backdrop-filter: blur(5px); }
.modal form { padding: 22px; }
.modal-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.modal-header h2 { margin-top: 4px; font-size: 22px; font-weight: 480; letter-spacing: -.02em; }
.dialog-close { flex: 0 0 auto; }
.modal label { display: grid; gap: 8px; margin-top: 15px; color: var(--muted); font-size: 10px; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; }
.date-picker-row { display: grid; grid-template-columns: minmax(0, 1fr) 86px; gap: 10px; align-items: end; }
.date-picker-row label { margin-top: 0; }
.modal input,
.modal select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: 0;
  background: rgba(255,255,255,.035);
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.modal input:focus,
.modal select:focus { border-color: var(--line-strong); }
.dialog-note, .fine-print { margin-top: 14px; color: var(--faint); font-size: 10px; line-height: 1.55; }
.warning { margin-top: 12px; padding: 10px; border: 1px solid rgba(221, 178, 112, .24); border-radius: 9px; color: #d9bc8a; background: rgba(221,178,112,.05); font-size: 10px; line-height: 1.4; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 22px; }
.about-modal { width: min(570px, calc(100vw - 32px)); }
.about-copy { display: grid; gap: 13px; color: #bdc5cf; font-size: 12px; line-height: 1.65; }
.about-copy strong { color: var(--text); font-weight: 600; }
.about-copy .fine-print { margin: 3px 0 0; }

.toast {
  position: absolute;
  z-index: 10;
  top: 96px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 13px;
  border-radius: 10px;
  color: var(--muted);
  font-size: 10px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

button:focus-visible,
select:focus-visible,
input:focus-visible { outline: 2px solid rgba(224, 231, 239, 0.52); outline-offset: 2px; }

@media (max-width: 760px) {
  .masthead { top: max(12px, env(safe-area-inset-top)); left: max(12px, env(safe-area-inset-left)); padding: 11px 12px; min-width: 0; }
  .date-readout { top: max(12px, env(safe-area-inset-top)); right: max(12px, env(safe-area-inset-right)); padding: 12px; }
  #dateMain { font-size: 10px; letter-spacing: .04em; }
  .model-note { display: none; }
  .view-controls {
    right: auto;
    left: 50%;
    bottom: calc(max(13px, env(safe-area-inset-bottom)) + 58px);
    width: min(calc(100vw - 24px), 320px);
    max-width: calc(100vw - 24px);
    justify-content: center;
    transform: translateX(-50%);
  }
  .compact-toggle span, .text-button { padding: 7px; font-size: 8px; }
  .timeline {
    bottom: max(12px, env(safe-area-inset-bottom));
    width: min(calc(100vw - 24px), 320px);
    max-width: calc(100vw - 24px);
    justify-content: center;
  }
  .speed-label select { width: 121px; font-size: 9px; }
  .planet-card {
    top: auto;
    right: max(12px, env(safe-area-inset-right));
    bottom: calc(max(12px, env(safe-area-inset-bottom)) + 112px);
    left: max(12px, env(safe-area-inset-left));
    width: auto;
    transform: none;
  }
  .metrics { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .modal form { padding: 20px; }
  .modal label { min-width: 0; }
  .modal input,
  .modal select {
    display: block;
    max-width: 100%;
    min-width: 0;
  }
  .modal input[type="date"],
  .modal input[type="time"] {
    -webkit-appearance: none;
    appearance: none;
    inline-size: 100%;
    max-inline-size: 100%;
  }
  .modal input[type="date"]::-webkit-date-and-time-value,
  .modal input[type="time"]::-webkit-date-and-time-value {
    min-width: 0;
    text-align: left;
  }
  .date-picker-row {
    grid-template-columns: minmax(0, 1fr) 76px;
    column-gap: 12px;
  }
  .date-picker-row .date-picker-field,
  .date-picker-row .era-picker-field {
    min-width: 0;
    overflow: hidden;
  }
  .date-picker-row .date-picker-field input {
    width: calc(100% - 6px);
    justify-self: start;
  }
  .masthead p { display: none; }
  .masthead .icon-button { display: none; }
  .date-readout { max-width: 52vw; }
  .compact-toggle:nth-child(3) { display: none; }
  .timeline { gap: 2px; }
  .transport-button { width: 31px; height: 31px; }
  .speed-label select { width: 112px; padding-left: 6px; }
  .timeline .text-button { padding-inline: 6px; }
  .metrics { grid-template-columns: 1fr 1fr; }
}

@media (hover: none) and (pointer: coarse) and (orientation: landscape) and (max-height: 480px) {
  .modal form { padding: 20px; }
  .modal label { min-width: 0; }
  .modal input,
  .modal select {
    display: block;
    max-width: 100%;
    min-width: 0;
  }
  .modal input[type="date"],
  .modal input[type="time"] {
    -webkit-appearance: none;
    appearance: none;
    inline-size: 100%;
    max-inline-size: 100%;
  }
  .modal input[type="date"]::-webkit-date-and-time-value,
  .modal input[type="time"]::-webkit-date-and-time-value {
    min-width: 0;
    text-align: left;
  }
  .date-picker-row {
    grid-template-columns: minmax(0, 1fr) 76px;
    column-gap: 12px;
  }
  .date-picker-row .date-picker-field,
  .date-picker-row .era-picker-field {
    min-width: 0;
    overflow: hidden;
  }
  .date-picker-row .date-picker-field input {
    width: calc(100% - 6px);
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
}