/* VTK Explorer: a darkroom for 3D data. Violet-black panels, sky blue signal. */

:root {
  --bg: #0c0b10;
  --panel: #121018;
  --panel-2: #1a1823;
  --line: #262331;
  --line-2: #34303f;
  --ink: #ecebf2;
  --ink-2: #a9a6b8;
  --muted: #6f6c80;
  --accent: #5cc8ff;
  --accent-dim: rgba(92, 200, 255, 0.12);
  --viewport: #09080c; /* matches BACKGROUND in demos/common.py */
  --display: Syne, "DM Sans", sans-serif;
  --sans: "DM Sans", system-ui, sans-serif;
  --mono: "DM Mono", ui-monospace, monospace;
  --topbar: 56px;
  --rail: 264px;
  --inspector: 312px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: #06141c; }

/* ---------- shell: one screen, no page scroll ---------- */

.shell {
  height: 100dvh;
  display: grid;
  grid-template-rows: var(--topbar) minmax(0, 1fr);
  grid-template-columns: minmax(0, 1fr);
  overflow: hidden;
}

.workspace {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr) var(--inspector);
  min-height: 0;
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.brand { display: flex; align-items: baseline; gap: 16px; min-width: 0; }

.wordmark {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--display);
  font-weight: 800;
  font-size: 21px;
  letter-spacing: -0.02em;
}

.wordmark em {
  font-style: normal;
  font-weight: 500;
  color: var(--accent);
}

.tagline {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.header-actions { display: flex; align-items: center; gap: 6px; }

.header-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
}

.header-link:hover { color: var(--ink); background: var(--panel-2); }

/* The Plotly logo is dark-on-light, so it sits on its own paper chip */
.logo-chip {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 6px;
  margin-left: 6px;
  border-radius: 4px;
  background: #f4f3ef;
}

.logo-chip img { height: 30px; display: block; }

/* ---------- left rail ---------- */

.rail {
  overflow-y: auto;
  padding: 10px 10px 16px;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.nav-group {
  margin: 14px 8px 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-group:first-child { margin-top: 4px; }

.nav-item {
  position: relative;
  display: grid;
  grid-template-columns: 18px 52px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 7px 8px;
  border-radius: 6px;
  color: var(--ink-2);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav-item:hover { background: var(--panel-2); color: var(--ink); }

.nav-item.active { background: var(--accent-dim); color: var(--ink); }

.nav-item.active::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--accent);
}

.nav-index { font-family: var(--mono); font-size: 11px; color: var(--muted); }
.nav-item.active .nav-index { color: var(--accent); }

.nav-thumb {
  width: 52px;
  height: 38px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line-2);
  background: var(--viewport);
}

.nav-item.active .nav-thumb { border-color: var(--accent); }

.nav-text { display: flex; flex-direction: column; min-width: 0; }

.nav-title { font-size: 14px; font-weight: 600; line-height: 1.25; }

.nav-kicker {
  font-size: 11.5px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- stage ---------- */

.stage {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  grid-template-columns: minmax(0, 1fr);
  overflow: hidden;
  gap: 10px;
  padding: 14px 14px 10px;
  min-width: 0;
  min-height: 0;
  background:
    radial-gradient(circle at 1px 1px, #1c1a24 1px, transparent 0) 0 0 / 18px 18px,
    var(--bg);
}

.frame {
  position: relative;
  min-width: 0;
  min-height: 0;
  border-radius: 4px;
  background: var(--viewport);
  outline: 1px solid var(--line);
}

.viewport { position: absolute; inset: 0; overflow: hidden; border-radius: 4px; }
.viewport > div, .viewport canvas { max-width: 100%; }

.scene-tag {
  position: absolute;
  top: 12px;
  right: 14px;
  z-index: 2;
  padding: 4px 8px;
  border-radius: 3px;
  background: rgba(12, 11, 16, 0.72);
  backdrop-filter: blur(6px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  pointer-events: none;
}

.readout {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 32px;
  padding: 0 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-2);
}

/* Stats that don't fit wrap onto a hidden second line instead of being cut mid-word */
.readout-stats { display: flex; flex-wrap: wrap; gap: 20px 22px; max-height: 18px; min-width: 0; overflow: hidden; }

.stat { display: inline-flex; align-items: baseline; gap: 8px; white-space: nowrap; color: var(--ink); }

.stat small {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.readout .mantine-Button-root { flex-shrink: 0; font-family: var(--mono); }

.readout-keys {
  display: flex;
  flex-shrink: 0;
  gap: 14px;
  margin-left: auto;
  color: var(--muted);
  white-space: nowrap;
}

kbd {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 1px 5px;
  border: 1px solid var(--line-2);
  border-bottom-width: 2px;
  border-radius: 3px;
  color: var(--ink-2);
  background: var(--panel);
}

/* ---------- inspector ---------- */

.inspector {
  overflow-y: auto;
  border-left: 1px solid var(--line);
  background: var(--panel);
}

.insp-head { padding: 18px 20px 16px; border-bottom: 1px solid var(--line); }

.insp-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.insp-meta span:first-child { color: var(--accent); }

.insp-title {
  margin: 8px 0 8px;
  font-family: var(--display);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.insp-about { margin: 0; font-size: 13px; line-height: 1.5; color: var(--ink-2); }

.section { padding: 14px 20px 6px; border-bottom: 1px solid var(--line); }
.section:last-child { border-bottom: 0; }

.section-label {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.field { margin-bottom: 6px; }

.field-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--ink);
}

.field-hint { font-family: var(--mono); font-size: 11px; color: var(--muted); }

.hints { margin: 0 0 10px; padding-left: 16px; font-size: 12.5px; line-height: 1.55; color: var(--ink-2); }
.hints li::marker { color: var(--accent); content: "› "; }

.probe { display: grid; gap: 4px; margin-bottom: 10px; }

.probe-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: 4px;
  background: var(--panel-2);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

.probe-row b { font-weight: 500; color: var(--ink); }

/* Mantine touches */
.mantine-Slider-markLabel { font-family: var(--mono); font-size: 10px; color: var(--muted); }
.mantine-SegmentedControl-root { background: var(--bg); }

/* vtk.js volume editor: blend into the theme */
.viewport .vtk-volume-controller,
.viewport [class*="VolumeController"] { border-radius: 4px; }

/* ---------- smaller screens ---------- */

@media (max-width: 1280px) {
  :root { --rail: 220px; --inspector: 280px; }
  .nav-item { grid-template-columns: 52px minmax(0, 1fr); }
  .nav-index { display: none; }
  .readout-keys { display: none; }
  .tagline { display: none; }
}

@media (max-width: 900px) {
  .shell { height: auto; min-height: 100dvh; overflow: visible; grid-template-rows: var(--topbar) auto; }
  .workspace { grid-template-columns: minmax(0, 1fr); }
  .rail { display: flex; gap: 6px; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); padding: 8px; }
  .nav-group { display: none; }
  .nav-item { flex: 0 0 auto; grid-template-columns: 40px auto; }
  .nav-item.active::before { display: none; }
  .nav-thumb { width: 40px; height: 30px; }
  .nav-kicker { display: none; }
  .stage { height: 62dvh; padding: 10px 16px; }
  .inspector { border-left: 0; border-top: 1px solid var(--line); overflow: visible; }
  .topbar { padding: 0 16px; }
  .wordmark { font-size: 18px; }
  .header-actions { gap: 0; }
  .header-link { font-size: 0; gap: 0; padding: 6px; }
  .header-link svg { width: 18px; height: 18px; }
  .logo-chip { height: 28px; }
  .logo-chip img { height: 26px; }
}