:root {
  --bg: #16181c;
  --panel: #1e2126;
  --panel2: #262a31;
  --line: #343a43;
  --text: #e6e8ec;
  --dim: #9aa2ad;
  --accent: #6fb2ff;
  --accent2: #2b6cb0;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.45 ui-sans-serif, system-ui, "Segoe UI", Roboto, sans-serif;
}

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

/* ---------- top bar ---------- */

#topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  flex: 0 0 auto;
  flex-wrap: wrap;
}

.brand { font-weight: 700; letter-spacing: .04em; }
.spacer { flex: 1 1 auto; }
.views, .fileops { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.views .sep { width: 1px; height: 20px; background: var(--line); margin: 0 4px; }

button, .btn, select, input[type=text], input[type=number] {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 5px 9px;
  font: inherit;
  cursor: pointer;
}

input[type=text], input[type=number], select { cursor: text; width: 100%; }
select { cursor: pointer; }
/* The library picker sits in the flex top bar, where width:100% would wrap it. */
#library { width: auto; max-width: 200px; }

button:hover, .btn:hover { border-color: var(--accent); }
button.primary { background: var(--accent2); border-color: var(--accent2); }
button.primary:hover { background: #3a7fc4; }
button.block, .btn.block { display: block; width: 100%; text-align: center; margin-top: 6px; }
button.danger:hover { border-color: #e06c6c; color: #ffb3b3; }

/* ---------- layout ---------- */

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

#sidebar {
  width: 260px;
  flex: 0 0 260px;
  overflow-y: auto;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding-bottom: 40px;
  transition: width 0.2s ease, flex 0.2s ease, padding 0.2s ease;
}

main.sidebar-collapsed #sidebar {
  width: 0px;
  flex: 0 0 0px;
  overflow: hidden;
  padding: 0;
  border-right: none;
}

.sidebar-toggle-btn {
  background: rgba(30, 36, 46, 0.95);
  color: #6fb2ff;
  border: 1px solid rgba(111, 178, 255, 0.3);
  font-size: 10px;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  margin: 6px;
  width: calc(100% - 12px);
  text-align: center;
  transition: all 0.15s ease;
}
.sidebar-toggle-btn:hover {
  background: rgba(45, 55, 72, 0.95);
  border-color: #6fb2ff;
  color: #ffffff;
}

#stage { flex: 1 1 auto; position: relative; min-width: 0; overflow: hidden; }
.site-photo-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  pointer-events: none;
  z-index: 0;
  transform-origin: center center;
  transition: opacity 0.1s ease;
}
#view { width: 100%; height: 100%; display: block; position: relative; z-index: 1; }

.photo-drag-badge {
  position: absolute;
  top: 48px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(43, 108, 176, 0.92);
  color: #ffffff;
  font-size: 11px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  pointer-events: none;
  box-shadow: 0 3px 10px rgba(0,0,0,0.5);
  z-index: 100;
  letter-spacing: 0.02em;
}

.view-bar {
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  z-index: 10;
  pointer-events: none;
}
.view-bar > * {
  pointer-events: auto;
}
.view-rot-group {
  display: flex;
  gap: 4px;
  background: rgba(18, 22, 28, 0.88);
  padding: 3px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
}
.btn-rot {
  background: #283344;
  color: #6fb2ff;
  border: 1px solid rgba(111,178,255,0.3);
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-rot:hover {
  background: #3b4b63;
  color: #ffffff;
  border-color: #6fb2ff;
}
.view-presets-bar {
  background: rgba(18, 22, 28, 0.88);
  padding: 3px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  margin: 0;
}

.unit-summary {
  margin-bottom: 8px;
  padding: 8px;
  background: rgba(111, 178, 255, 0.08);
  border-radius: 6px;
  font-size: 11px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  color: #cfd6e0;
  border: 1px solid rgba(111, 178, 255, 0.25);
}

.summary-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(30, 36, 46, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 10.5px;
  color: #e2e7ee;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.summary-pill:hover {
  background: rgba(111, 178, 255, 0.22);
  border-color: rgba(111, 178, 255, 0.55);
  color: #ffffff;
  transform: translateY(-1px);
}

.summary-pill:active {
  transform: translateY(0);
}

.summary-pill .pill-lbl {
  color: #9aa2ad;
  font-size: 9px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.summary-pill .pill-val {
  font-weight: 600;
  color: #6fb2ff;
}

#hud {
  position: absolute;
  left: 10px;
  bottom: 10px;
  font: 11px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: #cfd6e0;
  background: rgba(0,0,0,.45);
  padding: 6px 9px;
  border-radius: 5px;
  pointer-events: none;
  white-space: pre;
}

/* ---------- Collapsible Accordion Panels ---------- */

.panel.collapsible {
  border-bottom: 1px solid var(--line);
  padding: 0;
  margin-bottom: 0;
}

.panel.collapsible .panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: rgba(22, 27, 34, 0.95);
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.panel.collapsible .panel-header:hover {
  background: rgba(35, 42, 54, 0.95);
}

.panel.collapsible.open .panel-header {
  border-bottom-color: var(--line);
  background: rgba(26, 32, 42, 0.95);
}

.panel.collapsible .panel-header h2 {
  margin: 0;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #c9d1d9;
  display: flex;
  align-items: center;
  gap: 7px;
}

.panel.collapsible .panel-header h2 .icon {
  font-size: 13px;
}

.panel.collapsible .panel-header h2 .count { color: var(--accent); }

.panel.collapsible .panel-header .chevron {
  font-size: 10px;
  color: #8b949e;
  transition: color 0.15s ease, transform 0.2s ease;
}

.panel.collapsible.open .panel-header .chevron {
  color: var(--accent);
}

.panel.collapsible .panel-body {
  display: none;
  padding: 12px;
}

.panel.collapsible.open .panel-body {
  display: block;
}

.panel h2 {
  margin: 0 0 8px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--dim);
}
.panel h2 .count { color: var(--accent); }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 8px; }
.grid2 label, .row { display: flex; flex-direction: column; gap: 3px; }
.grid2 label span, .row > span { font-size: 11px; color: var(--dim); }
.row { margin-bottom: 6px; }
.row.check, label.check { flex-direction: row; align-items: center; gap: 7px; margin-top: 6px; }
.row.check span { font-size: 12px; color: var(--text); }
.btnrow { display: flex; gap: 5px; margin-bottom: 8px; }
.btnrow button { flex: 1; }

.colors input[type=color] {
  width: 100%; height: 26px; padding: 0;
  background: none; border: 1px solid var(--line); border-radius: 5px; cursor: pointer;
}

input[type=range] { width: 100%; accent-color: var(--accent); }
input[type=checkbox] { accent-color: var(--accent); width: 15px; height: 15px; }

.hint { color: var(--dim); font-size: 11px; margin: 8px 0 0; }

/* ---------- opening rows ---------- */

.opening {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 8px;
  margin-bottom: 7px;
  background: var(--panel2);
}
.opening.sel { border-color: var(--accent); }
.opening header {
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 6px; font-size: 12px;
}
.opening header .tag {
  font-size: 10px; text-transform: uppercase; letter-spacing: .06em;
  background: var(--accent2); border-radius: 3px; padding: 1px 5px;
}
.opening header .tag.window { background: #4a5568; }
.opening header input.lbl { flex: 1; padding: 3px 6px; font-size: 12px; }
.opening .grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px; }
.opening .grid4 label { display: flex; flex-direction: column; gap: 2px; }
.opening .grid4 span { font-size: 10px; color: var(--dim); }
.opening .grid4 input, .opening select { padding: 3px 5px; font-size: 12px; }
.opening .foot { display: flex; gap: 5px; margin-top: 6px; align-items: center; }
.opening .foot select { flex: 1; }