/* ── Reset & Variables ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #0a0a0f;
  --panel-bg:    #111827;
  --panel-border: #1f2937;
  --text:        #e5e7eb;
  --text-muted:  #6b7280;
  --accent:      #3b82f6;
  --accent-dim:  #1d4ed8;
  --danger:      #ef4444;
  --sidebar-w:   220px;
  --statusbar-h: 28px;
  --font:        'Courier New', Courier, monospace;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 12px;
  overflow: hidden;
}

/* ── Layout ────────────────────────────────────────── */
body {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--sidebar-w);
  grid-template-rows: 1fr var(--statusbar-h);
  grid-template-areas:
    "left  viewport right"
    "left  status   right";
}

#sidebar-left  { grid-area: left; }
#viewport      { grid-area: viewport; position: relative; }
#sidebar-right { grid-area: right; }
#statusbar     { grid-area: status; }

/* ── Sidebars ──────────────────────────────────────── */
.sidebar {
  background: var(--panel-bg);
  border-right: 1px solid var(--panel-border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

#sidebar-right { border-right: none; border-left: 1px solid var(--panel-border); }

.sidebar-header {
  padding: 14px 12px 10px;
  border-bottom: 1px solid var(--panel-border);
}

.logo {
  font-size: 13px;
  font-weight: bold;
  letter-spacing: 4px;
  color: var(--accent);
}

/* ── Panels ────────────────────────────────────────── */
.panel {
  padding: 12px;
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.panel-title {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* ── Tool Grid ─────────────────────────────────────── */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

.tool-btn {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text-muted);
  padding: 8px;
  cursor: pointer;
  font-size: 14px;
  border-radius: 3px;
  transition: all 0.15s;
}

.tool-btn:hover  { border-color: var(--accent); color: var(--text); }
.tool-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── Terrain Type Buttons ──────────────────────────── */
.terrain-types {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.terrain-btn {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text-muted);
  padding: 5px 8px;
  text-align: left;
  cursor: pointer;
  font-family: var(--font);
  font-size: 11px;
  border-radius: 2px;
  transition: all 0.15s;
}

.terrain-btn:hover  { border-color: var(--accent); color: var(--text); }
.terrain-btn.active { border-color: var(--accent); color: var(--accent); background: #1e3a5f22; }

.terrain-btn[data-terrain="ocean"]         { border-left: 3px solid #1a3a5c; }
.terrain-btn[data-terrain="coast"]         { border-left: 3px solid #2d6a9f; }
.terrain-btn[data-terrain="beach"]         { border-left: 3px solid #c8b87a; }
.terrain-btn[data-terrain="desert_yellow"] { border-left: 3px solid #d9b84c; }
.terrain-btn[data-terrain="desert_white"]  { border-left: 3px solid #ece8d9; }
.terrain-btn[data-terrain="plains"]        { border-left: 3px solid #4a7c3f; }
.terrain-btn[data-terrain="hills"]         { border-left: 3px solid #3d5c2a; }
.terrain-btn[data-terrain="mountains"]     { border-left: 3px solid #7a5c3a; }
.terrain-btn[data-terrain="peaks"]         { border-left: 3px solid #e8e8e8; }

/* ── Sliders ───────────────────────────────────────── */
.slider-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 11px;
}

.slider-label input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  height: 3px;
}

.slider-label span {
  width: 26px;
  text-align: right;
  color: var(--text);
}

/* Land shape slider — full-width with endpoint labels */
.land-shape-label {
  flex-direction: column;
  gap: 4px;
  align-items: stretch;
}

.land-shape-ends {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
  width: auto !important;
}

.land-shape-label input[type="range"] {
  width: 100%;
}

/* ── Buttons ───────────────────────────────────────── */
.btn-primary, .btn-secondary {
  width: 100%;
  padding: 7px;
  border-radius: 3px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 1px;
  transition: all 0.15s;
  border: 1px solid;
}

.btn-primary  { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover  { background: var(--accent-dim); }

.btn-secondary { background: transparent; border-color: var(--panel-border); color: var(--text-muted); }
.btn-secondary:hover { border-color: var(--accent); color: var(--text); }

/* ── Form Fields ───────────────────────────────────── */
.field-label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.field-label input,
.field-label textarea {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 5px 7px;
  font-family: var(--font);
  font-size: 11px;
  border-radius: 2px;
  resize: vertical;
}

.field-label input:focus,
.field-label textarea:focus {
  outline: none;
  border-color: var(--accent);
}

/* ── Marker List ───────────────────────────────────── */
.marker-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.marker-empty { color: var(--text-muted); font-style: italic; font-size: 11px; }

.marker-item {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  padding: 5px 7px;
  border-radius: 2px;
  cursor: pointer;
  font-size: 11px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.marker-item:hover { border-color: var(--accent); }

.marker-item .marker-remove {
  color: var(--text-muted);
  cursor: pointer;
  font-size: 10px;
}

.marker-item .marker-remove:hover { color: var(--danger); }

/* ── Viewport & Canvas ─────────────────────────────── */
#viewport { background: var(--bg); overflow: hidden; position: relative; }

#planet-canvas,
#map-canvas,
#orbital-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* ── View Toggle ───────────────────────────────────── */
#view-toggle {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 2px;
  z-index: 20;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  padding: 2px;
}

.view-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 5px 14px;
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
}

.view-btn:hover  { color: var(--text); }
.view-btn.active { background: var(--accent); color: #fff; }

/* ── Status Bar ────────────────────────────────────── */
#statusbar {
  background: var(--panel-bg);
  border-top: 1px solid var(--panel-border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 24px;
  font-size: 11px;
  color: var(--text-muted);
}

#statusbar span { white-space: nowrap; }

/* ── Dialog ────────────────────────────────────────── */
dialog {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--font);
  padding: 20px;
  min-width: 280px;
}

dialog::backdrop { background: rgba(0,0,0,0.6); }

dialog h3 {
  font-size: 13px;
  letter-spacing: 2px;
  margin-bottom: 14px;
  color: var(--accent);
}

dialog label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

dialog input, dialog textarea {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 6px 8px;
  font-family: var(--font);
  font-size: 11px;
  border-radius: 2px;
  resize: vertical;
}

.dialog-actions {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

/* ── Orbit designer ────────────────────────────────── */
.collapsible-title {
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 0;
}
.collapsible-title:hover { color: var(--text); }

.collapsible-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

.orbit-mode-row {
  display: flex;
  gap: 3px;
}

.orbit-mode-btn {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text-muted);
  padding: 5px;
  font-family: var(--font);
  font-size: 10px;
  letter-spacing: 0.5px;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
}
.orbit-mode-btn:hover  { border-color: var(--accent); color: var(--text); }
.orbit-mode-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.orbit-group {
  border: 1px solid var(--panel-border);
  border-radius: 3px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.orbit-group-title {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2px;
}

.orbit-stats {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 2px;
  padding: 6px 8px;
  font-size: 10px;
  color: var(--text-muted);
  line-height: 1.7;
}

.orbit-derived {
  border-color: #1f3a5f;
  color: var(--text);
}

.orbit-stat-row { display: flex; justify-content: space-between; }
.orbit-stat-val { color: var(--accent); font-weight: bold; }

/* ── Browser save slots ────────────────────────────── */
.save-slot-row {
  display: flex;
  gap: 6px;
}

.save-slot-row input[type="text"] {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 5px 7px;
  font-family: var(--font);
  font-size: 11px;
  border-radius: 2px;
  min-width: 0;
}

.save-slot-row input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

.btn-small {
  padding: 5px 10px;
  font-size: 10px;
  width: auto;
  white-space: nowrap;
}

.save-item {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 2px;
  padding: 5px 7px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  cursor: pointer;
  transition: border-color 0.15s;
}

.save-item:hover { border-color: var(--accent); }

.save-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.save-item-name {
  font-size: 11px;
  color: var(--text);
  font-weight: bold;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.save-item-date {
  font-size: 9px;
  color: var(--text-muted);
  white-space: nowrap;
  margin-left: 6px;
}

.save-item-actions {
  display: flex;
  gap: 6px;
  margin-top: 3px;
}

.save-action-btn {
  background: none;
  border: 1px solid var(--panel-border);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 9px;
  padding: 2px 6px;
  border-radius: 2px;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: all 0.15s;
}

.save-action-btn:hover        { border-color: var(--accent); color: var(--text); }
.save-action-btn.delete:hover { border-color: var(--danger); color: var(--danger); }

/* ── Toggle switches ───────────────────────────────── */
.toggle-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 2px;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.toggle-label input[type="checkbox"] { display: none; }

.toggle-track {
  width: 28px;
  height: 14px;
  background: var(--panel-border);
  border-radius: 7px;
  flex-shrink: 0;
  position: relative;
  transition: background 0.2s;
}

.toggle-track::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--text-muted);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform 0.2s, background 0.2s;
}

.toggle-label input:checked + .toggle-track { background: var(--accent); }
.toggle-label input:checked + .toggle-track::after {
  transform: translateX(14px);
  background: #fff;
}

.sun-time-display {
  width: 36px !important;
  font-size: 10px;
}

/* ── Scrollbar ─────────────────────────────────────── */
::-webkit-scrollbar       { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 2px; }