:root {
  color-scheme: dark;
  --panel-width: 400px;
  --bg: #080b12;
  --glass: rgba(20, 25, 36, 0.54);
  --glass-strong: rgba(22, 28, 41, 0.72);
  --stroke: rgba(255, 255, 255, 0.14);
  --stroke-bright: rgba(255, 255, 255, 0.23);
  --text: rgba(255, 255, 255, 0.96);
  --muted: rgba(222, 230, 242, 0.62);
  --accent: #fff2b0;
  --blue: #8cc8ff;
}

* { box-sizing: border-box; }
html, body, #app {
  width: 100%; height: 100%; margin: 0; overflow: hidden;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 24% 18%, rgba(73, 116, 175, 0.16), transparent 34%),
    radial-gradient(circle at 78% 78%, rgba(74, 33, 109, 0.14), transparent 38%),
    var(--bg);
}
button, input, textarea { font: inherit; }
button { color: inherit; }
#viewport { position: absolute; inset: 0; }
canvas { display: block; width: 100%; height: 100%; }

.glass-panel, .glass-card {
  position: relative; overflow: hidden; border: 1px solid var(--stroke);
  background: linear-gradient(135deg, rgba(255,255,255,0.09), rgba(255,255,255,0.018) 38%), var(--glass);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.16), inset 0 -1px 0 rgba(255,255,255,0.035), 0 22px 70px rgba(0, 0, 0, 0.36);
  backdrop-filter: blur(26px) saturate(175%); -webkit-backdrop-filter: blur(26px) saturate(175%);
}
.glass-panel::before, .glass-card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(circle at 12% 0%, rgba(255,255,255,0.18), transparent 28%), linear-gradient(120deg, transparent 25%, rgba(255,255,255,0.035), transparent 65%);
  opacity: 0.72;
}

#panel {
  position: absolute; z-index: 10; top: 14px; right: 14px; bottom: 14px;
  width: min(var(--panel-width), calc(100vw - 28px));
  padding: 18px; overflow-y: auto; border-radius: 28px;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.2) transparent;
  transition: transform 260ms cubic-bezier(.2,.8,.2,1), opacity 220ms ease;
}
#panel.is-collapsed { transform: translateX(calc(100% + 30px)); opacity: 0; pointer-events: none; }

.app-header, .section-heading, .hierarchy-heading {
  display: flex; align-items: center; justify-content: space-between;
}
.app-header { position: relative; z-index: 1; gap: 12px; margin-bottom: 4px; }
.eyebrow { margin-bottom: 2px; color: var(--blue); font-size: 11px; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 0; font-size: 24px; font-weight: 760; letter-spacing: -.03em; }
#status { position: relative; z-index: 1; margin: 4px 0 16px; color: var(--muted); font-size: 12px; }
.icon-button, .floating-open { border: 1px solid var(--stroke); background: rgba(255,255,255,.07); cursor: pointer; }
.icon-button { width: 34px; height: 34px; border-radius: 50%; font-size: 21px; }

.glass-card {
  position: relative; z-index: 1; margin-bottom: 11px; padding: 13px; border-radius: 18px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.12), 0 10px 30px rgba(0,0,0,.16);
}
.compact-card { padding: 8px; }
.section-heading { position: relative; z-index: 1; margin-bottom: 9px; font-size: 12px; font-weight: 720; letter-spacing: .025em; }
.microcopy { position: relative; z-index: 1; margin: -3px 0 10px; color: var(--muted); font-size: 10px; line-height: 1.35; }
.status-line { margin-top: 10px; }
.column-legend { display: grid; grid-template-columns: 34px 34px; gap: 6px; color: var(--muted); font-size: 10px; text-align: center; }

.tab-switch {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.tab-button {
  position: relative; z-index: 1; min-height: 38px; border: 1px solid var(--stroke); border-radius: 12px;
  background: rgba(255,255,255,.05); color: var(--muted); cursor: pointer;
  transition: all 140ms ease;
}
.tab-button.is-active {
  color: white; border-color: rgba(140,200,255,.45);
  background: linear-gradient(180deg, rgba(140,200,255,.24), rgba(140,200,255,.08));
}
.tab-page { display: none; }
.tab-page.is-active { display: block; }

.preset-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.preset-grid button, .panel-footer button, #generate-drawing, .download-button {
  min-height: 36px; padding: 8px 10px; border: 1px solid var(--stroke); border-radius: 12px;
  color: rgba(255,255,255,.88); background: linear-gradient(180deg, rgba(255,255,255,.095), rgba(255,255,255,.035));
  cursor: pointer; transition: transform 150ms ease, background 150ms ease, border-color 150ms ease; text-decoration: none;
  display: inline-flex; align-items: center; justify-content: center;
}
.preset-grid button:hover, .panel-footer button:hover, #generate-drawing:hover, .download-button:hover {
  transform: translateY(-1px); border-color: var(--stroke-bright);
  background: linear-gradient(180deg, rgba(255,255,255,.14), rgba(255,255,255,.055));
}

.laterality-controls { position: relative; z-index: 1; display: grid; gap: 6px; }
.laterality-row { display: grid; grid-template-columns: minmax(0,1fr) 34px 34px; gap: 6px; align-items: center; }
.side-master, .channel-toggle, .tree-toggle {
  border: 1px solid var(--stroke); color: var(--muted); background: rgba(255,255,255,.045); cursor: pointer;
  transition: color 140ms ease, background 140ms ease, border-color 140ms ease, transform 140ms ease;
}
.side-master { height: 34px; padding: 0 11px; border-radius: 11px; text-align: left; }
.channel-toggle, .tree-toggle { display: inline-grid; place-items: center; border-radius: 10px; font-size: 10px; font-weight: 780; }
.channel-toggle { width: 34px; height: 34px; }
.channel-toggle:hover, .tree-toggle:hover, .side-master:hover { transform: translateY(-1px); border-color: var(--stroke-bright); }
.channel-toggle.is-active[data-channel="structure"], .tree-toggle.is-active[data-channel="structure"] {
  color: #dff1ff; border-color: rgba(140, 200, 255, .52); background: linear-gradient(180deg, rgba(140,200,255,.28), rgba(140,200,255,.11));
}
.channel-toggle.is-active[data-channel="label"], .tree-toggle.is-active[data-channel="label"] {
  color: #fff8ce; border-color: rgba(255, 242, 176, .52); background: linear-gradient(180deg, rgba(255,242,176,.25), rgba(255,242,176,.09));
}
.side-master.is-active {
  color: white; border-color: rgba(255,255,255,.25); background: linear-gradient(180deg, rgba(255,255,255,.13), rgba(255,255,255,.055));
}

.label-options { display: grid; gap: 11px; }
.label-options label, .prompt-label {
  position: relative; z-index: 1; display: grid; gap: 8px; color: var(--muted); font-size: 11px;
}
.label-options label { grid-template-columns: minmax(0,1fr) auto; align-items: center; }
.label-options input[type="range"] { width: 145px; accent-color: var(--blue); }
.label-options input[type="color"] { width: 42px; height: 28px; padding: 2px; border: 1px solid var(--stroke); border-radius: 9px; background: transparent; }
.switch-line input { position: absolute; opacity: 0; pointer-events: none; }
.switch { position: relative; width: 42px; height: 24px; border: 1px solid var(--stroke); border-radius: 999px; background: rgba(255,255,255,.08); transition: background 150ms ease; }
.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%; background: white; box-shadow: 0 2px 8px rgba(0,0,0,.35); transition: transform 150ms ease; }
.switch-line input:checked + .switch { background: rgba(80, 170, 255, .55); }
.switch-line input:checked + .switch::after { transform: translateX(18px); }

textarea {
  width: 100%; min-height: 112px; resize: vertical; padding: 12px; border: 1px solid var(--stroke); border-radius: 14px;
  outline: none; color: var(--text); background: rgba(5,8,14,.34);
}
textarea:focus, #search:focus { border-color: rgba(140,200,255,.5); box-shadow: 0 0 0 3px rgba(140,200,255,.09); }
.drawing-actions { position: relative; z-index: 1; display: flex; gap: 8px; flex-wrap: wrap; }
.result-card img {
  width: 100%; max-height: 430px; object-fit: contain; display: block; border-radius: 14px;
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
}
.empty-state {
  position: relative; z-index: 1; min-height: 220px; display: grid; place-items: center; text-align: center;
  color: var(--muted); border: 1px dashed rgba(255,255,255,.15); border-radius: 16px;
  background: rgba(255,255,255,.02); padding: 16px;
}

.hierarchy-header { position: sticky; z-index: 5; top: -18px; }
.search-wrap { position: relative; z-index: 1; }
.search-icon { position: absolute; top: 50%; left: 11px; transform: translateY(-50%); color: var(--muted); font-size: 16px; }
#search {
  width: 100%; height: 38px; padding: 0 12px 0 34px; border: 1px solid var(--stroke); border-radius: 12px; outline: none; color: var(--text); background: rgba(5,8,14,.34);
}
.tree { position: relative; z-index: 1; display: grid; gap: 7px; }
.group { overflow: hidden; border: 1px solid var(--stroke); border-radius: 16px; background: rgba(12,16,24,.35); box-shadow: inset 0 1px 0 rgba(255,255,255,.05); }
.group-summary { display: grid; grid-template-columns: 20px minmax(0,1fr) 34px 34px; gap: 6px; align-items: center; min-height: 48px; padding: 7px 9px; cursor: pointer; list-style: none; }
.group-summary::-webkit-details-marker { display: none; }
.disclosure { color: var(--muted); transform: rotate(-90deg); transition: transform 150ms ease; }
.group[open] .group-summary > .disclosure { transform: rotate(0); }
.row-title { min-width: 0; }
.row-title strong, .row-title span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row-title strong { color: rgba(255,255,255,.92); font-size: 12px; }
.row-title span { margin-top: 1px; color: var(--muted); font-size: 9px; }
.tree-toggle { width: 34px; height: 30px; }
.subgroup { border-top: 1px solid rgba(255,255,255,.07); }
.subgroup-header, .object-row { display: grid; grid-template-columns: minmax(0,1fr) 34px 34px; gap: 6px; align-items: center; }
.subgroup-header { min-height: 42px; padding: 6px 9px 6px 28px; background: rgba(255,255,255,.018); }
.object-list { display: grid; padding: 3px 0 7px; }
.object-row { min-height: 35px; padding: 3px 9px 3px 42px; color: var(--muted); font-size: 10px; }
.object-row:hover { background: rgba(255,255,255,.035); }
.object-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.panel-footer { position: relative; z-index: 1; padding: 14px 0 2px; }
.panel-footer button { width: 100%; }
.floating-open { position: absolute; z-index: 11; top: 16px; right: 16px; padding: 11px 16px; border-radius: 999px; }
.anatomy-label {
  padding: 4px 8px; color: var(--accent); border: 1px solid color-mix(in srgb, currentColor 58%, transparent); border-radius: 9px;
  background: linear-gradient(135deg, rgba(255,255,255,.10), rgba(255,255,255,.025)), rgba(8,11,17,.68);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14), 0 6px 18px rgba(0,0,0,.42);
  backdrop-filter: blur(10px) saturate(150%); -webkit-backdrop-filter: blur(10px) saturate(150%);
  font-size: 14px; font-weight: 680; line-height: 1.2; white-space: nowrap; pointer-events: none; transform: translate(-50%, -50%);
}
#tooltip {
  position: fixed; z-index: 30; max-width: 300px; padding: 7px 10px; color: white; border: 1px solid var(--stroke); border-radius: 10px;
  background: rgba(8,11,17,.76); box-shadow: 0 8px 28px rgba(0,0,0,.36); backdrop-filter: blur(14px); pointer-events: none; font-size: 11px;
}
[hidden] { display: none !important; }
@media (max-width: 720px) {
  :root { --panel-width: 360px; }
  #panel { top: 8px; right: 8px; bottom: 8px; width: calc(100vw - 16px); border-radius: 24px; }
}