:root {
  --bg: #07070d;
  --panel-bg: #10121a;
  --panel-bg2: #161a26;
  --border: #252a38;
  --text: #d8d8e6;
  --muted: #8388a0;
  --accent: #5ce3ff;
  --accent-2: #9a7dff;
  --danger: #ff6a6a;
}

* { box-sizing: border-box; }

input[type=number] {
  appearance: textfield;
  -moz-appearance: textfield;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
}

#toolbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 8px 12px;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
  user-select: none;
}

#toolbar .group {
  display: flex;
  align-items: center;
  gap: 6px;
}

#toolbar .group.separated {
  position: relative;
  padding-left: 22px;
}

#toolbar .group.separated::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04));
}

#toolbar .group.grow { flex: 1 1 auto; justify-content: center; }

#toolbar .toolbar-label {
  color: var(--muted);
}

#toolbar button {
  background: var(--panel-bg2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 12px;
  font: inherit;
  cursor: pointer;
}

#toolbar button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

#toolbar button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#toolbar button.active {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

#toolbar .toolbar-toggle button {
  border-radius: 0;
  border-top: none;
  border-bottom: none;
  border-left: none;
  border-right: 1px solid var(--border);
  padding: 5px 10px;
}

#toolbar .toolbar-toggle button:last-child { border-right: none; }

#toolbar .toolbar-toggle button:hover:not(:disabled) {
  color: var(--text);
  border-color: var(--border);
}

#toolbar #sky-mode-toggle .sky-mode-btn.active {
  background: var(--accent-2);
  color: #000;
  border-color: var(--accent-2);
}

#toolbar #star-size-toggle .star-size-btn.active {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

#toolbar #star-size-toggle .star-size-btn {
  display: grid;
  place-items: center;
  min-width: 30px;
  width: 30px;
  height: 30px;
  padding: 0;
}

#toolbar #star-size-toggle .star-size-btn svg {
  display: block;
  width: 18px;
  height: 18px;
  overflow: visible;
  pointer-events: none;
}

#toolbar .slider {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
}

#toolbar .slider input[type=range] {
  width: 220px;
}

#toolbar #brightness-readout {
  font-variant-numeric: tabular-nums;
  color: var(--text);
  min-width: 60px;
  text-align: right;
}

#toolbar #status {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

main {
  flex: 1 1 auto;
  display: flex;
  min-height: 0;
  min-width: 0;
}

#sky-wrap {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  background: #000;
}

#sky {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
  background: #000;
}

#sky-grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#usage-hint {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 7px 9px;
  pointer-events: none;
  color: rgba(216, 216, 230, 0.92);
  background: rgba(7, 7, 13, 0.55);
  border: 1px solid rgba(216, 216, 230, 0.16);
  border-radius: 4px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9);
  user-select: none;
}

#time-travel-bar {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  width: 80vw;
  box-sizing: border-box;
  background: rgba(7, 7, 13, 0.78);
  border: 1px solid var(--border);
  border-radius: 6px;
  pointer-events: auto;
  user-select: none;
}
#time-travel-bar.hidden { display: none; }
#time-travel-slider { flex: 1; }
#time-travel-year {
  font-size: 12px;
  color: var(--muted);
  min-width: 110px;
  text-align: right;
  white-space: nowrap;
}
#btn-time-travel-bake {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 4px;
  padding: 4px 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}
#btn-time-travel-bake:hover { color: var(--accent); border-color: var(--accent); }

#sky.panning { cursor: grabbing; }
#sky.adding  { cursor: crosshair; }
#sky.dragging { cursor: move; }

#panel {
  flex: 0 0 320px;
  display: flex;
  flex-direction: column;
  background: var(--panel-bg);
  border-left: 1px solid var(--border);
}

.panel-empty, #panel-form {
  flex: 1 1 auto;
  overflow-y: auto;
  min-height: 0;
  padding: 16px;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: rgba(92, 227, 255, 0.45) rgba(255, 255, 255, 0.04);
}

.panel-empty::-webkit-scrollbar,
#panel-form::-webkit-scrollbar {
  width: 12px;
}

.panel-empty::-webkit-scrollbar-track,
#panel-form::-webkit-scrollbar-track {
  margin: 6px 0;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 999px;
}

.panel-empty::-webkit-scrollbar-thumb,
#panel-form::-webkit-scrollbar-thumb {
  min-height: 40px;
  border: 3px solid transparent;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(92, 227, 255, 0.58), rgba(154, 125, 255, 0.42));
  background-clip: padding-box;
}

.panel-empty::-webkit-scrollbar-thumb:hover,
#panel-form::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(92, 227, 255, 0.74), rgba(154, 125, 255, 0.54));
  background-clip: padding-box;
}

.panel-empty::-webkit-scrollbar-corner,
#panel-form::-webkit-scrollbar-corner {
  background: transparent;
}

.panel-empty {
  color: var(--muted);
  text-align: center;
  padding-top: 40px;
  padding-bottom: 40px;
  line-height: 1.5;
}

#panel-form h3 {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 14px;
  text-transform: none;
  letter-spacing: normal;
}

#panel-subtitle {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 10px;
  color: var(--muted);
  margin: -8px 0 10px;
}

#panel-subtitle #subtitle-dist[data-clickable] {
  cursor: pointer;
}

#panel-subtitle #subtitle-dist[data-clickable]:hover {
  color: var(--text);
}

#panel-form label {
  display: block;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

#panel-form input, #panel-form select {
  display: block;
  width: 100%;
  margin-top: 3px;
  padding: 5px 7px;
  background: var(--panel-bg2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  font: inherit;
  font-variant-numeric: tabular-nums;
}

#panel-form input:focus, #panel-form select:focus {
  border-color: var(--accent);
  outline: none;
}

#panel-form input[readonly] {
  color: var(--muted);
  background: var(--panel-bg);
}

#panel-form fieldset {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 10px 2px;
  margin: 0 0 10px;
}

#panel-form fieldset legend {
  color: var(--muted);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0 4px;
}

#panel-form .row {
  display: flex;
  gap: 6px;
}

#panel-form .row label { flex: 1; }

.hidden { display: none !important; }

/* ---- Sky section (pinned to bottom of panel) ---- */

#sky-section {
  flex: 0 0 auto;
  border-top: 1px solid var(--border);
  padding: 12px 16px 16px;
}

#sky-mode-toggle,
#star-size-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

#sky-section fieldset {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 10px 6px;
  margin: 0 0 10px;
}

#sky-section fieldset legend {
  color: var(--muted);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0 4px;
}

#sky-section fieldset legend.legend-inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  box-sizing: border-box;
}

#sky-section label {
  display: block;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

#sky-section input, #sky-section select {
  display: block;
  width: 100%;
  margin-top: 3px;
  padding: 5px 7px;
  background: var(--panel-bg2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  font: inherit;
  font-variant-numeric: tabular-nums;
}

#sky-section input[type=range] { padding: 2px 0; }

#sky-section input:focus, #sky-section select:focus {
  border-color: var(--accent-2);
  outline: none;
}

#sky-section button {
  width: 100%;
  margin-top: 4px;
  padding: 5px;
  background: var(--panel-bg2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  font: inherit;
  font-size: 11px;
  cursor: pointer;
}

#sky-section button:hover { border-color: var(--accent-2); color: var(--accent-2); }

#sky-section .row { display: flex; gap: 6px; }
#sky-section .row label { flex: 1; }

#sky-time-readout {
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--text);
  display: inline-block;
  margin-top: 3px;
}

.row-inline {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: 6px;
  text-transform: none !important;
}

.legend-toggle {
  margin-bottom: 0 !important;
  font-size: 10px !important;
  color: var(--muted) !important;
}

.row-inline input[type=checkbox] { width: auto; display: inline; margin: 0; }

#banner {
  position: absolute;
  right: 12px;
  bottom: 12px;
  z-index: 3;
  max-width: min(420px, calc(100% - 24px));
  pointer-events: none;
  background: var(--danger);
  color: #000;
  padding: 10px 14px;
  border-radius: 6px;
  font-weight: 600;
  line-height: 1.4;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
}

/* --- Modal dialog --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 24px;
  min-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: -20px -24px 0;
  padding: 8px 10px 8px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-bg2);
  border-radius: 5px 5px 0 0;
}

.modal-titlebar h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
}

.modal-close {
  width: 13px;
  height: 19px;
  border-radius: 50%;
  background: #ff5f57;
  border: none;
  padding: 0;
  cursor: pointer;
  font-size: 9px;
  font-weight: 700;
  color: transparent;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover { color: rgba(0, 0, 0, 0.65); }

.modal-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.modal-footer {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.modal-footer button {
  width: 100%;
}

.modal button {
  background: var(--panel-bg2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 12px;
  font: inherit;
  cursor: pointer;
}

.modal button:hover { border-color: var(--accent); color: var(--accent); }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.checkbox-row input[type=number] {
  width: 52px;
  background: var(--panel-bg2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 5px;
  font: inherit;
}

.checkbox-row input[type=number]:disabled { opacity: 0.4; }

.mgr-stats {
  min-height: 1.4em;
  font-size: 12px;
  color: var(--muted);
}