/* Palette follows clinical review-station convention: near-black chrome so nothing
   competes with the greyscale image, one restrained accent, and saturated colour reserved
   exclusively for warnings. */
:root {
  /* NEUTRAL grey, not blue-black. Reading stations use a neutral chrome deliberately:
     any colour cast in the surround shifts how the eye judges greyscale, which is the one
     thing the operator is actually trying to assess. */
  --bg: #1c1c1c;
  --panel-bg: #252525;
  --panel-header: #2e2e2e;
  --toolbar: #2a2a2a;
  --border: #383838;
  --border-strong: #454545;
  --text: #dcdcdc;
  --text-dim: #8e8e8e;
  --accent: #4a7fa5;
  --accent-bright: #5d97be;
  --kidney-color: #ffb347;
  --tumor-color: #ff4d6d;
  /* Cool colour for cyst: a fluid cyst and a solid tumour must never be
     confused at a glance, so they sit at opposite ends of the spectrum. */
  --cyst-color: #4dd2ff;
  --danger: #d64550;
  /* Patient identity is annotated in green, the long-standing convention on review
     stations -- it reads as "who this is", distinct from the red regulatory warnings. */
  --anno-green: #52c41a;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}


* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 14px;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px;
  height: 42px;
  border-bottom: 1px solid var(--border-strong);
  background: var(--panel-header);
}

.app-header h1 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin: 0;
  padding-right: 12px;
  border-right: 1px solid var(--border);
}

/* Regulatory status belongs in the title bar of anything imaging-adjacent. */
.header-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--danger);
  border: 1px solid var(--danger);
  border-radius: 3px;
  padding: 2px 6px;
  white-space: nowrap;
}

.session-note {
  color: var(--text-dim);
  font-size: 11px;
  margin-left: auto;
}

.lang-switch {
  display: flex;
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  overflow: hidden;
}

.lang-btn {
  width: auto;
  margin: 0;
  padding: 3px 9px;
  background: transparent;
  border: 0;
  border-radius: 0;
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 600;
}

.lang-btn + .lang-btn { border-left: 1px solid var(--border-strong); }

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

.lang-btn:hover:not(.active) { background: #1d232c; color: var(--text); }

/* Thai needs more leading than Latin at the same size, and a font that actually has the
   glyphs -- otherwise tone marks collide with the line above. */
html.lang-th body {
  font-family: "Noto Sans Thai", "Thonburi", "Krungthep", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Helvetica, Arial, sans-serif;
}

html.lang-th .panel h2,
html.lang-th .field-label,
html.lang-th .toggle-row,
html.lang-th .slider-row,
html.lang-th .info-block,
html.lang-th .more-info,
html.lang-th button { line-height: 1.75; }

html.lang-th .panel h2 { letter-spacing: 0; }
html.lang-th .header-badge { letter-spacing: 0.02em; }

.app-layout {
  display: flex;
  height: calc(100vh - 42px - 30px);
}

.sidebar {
  width: 268px;
  min-width: 268px;
  overflow-y: auto;
  border-right: 1px solid var(--border-strong);
  background: var(--bg);
  padding: 0;
}

/* Square, stacked, hairline-separated panels — closer to a review station's tool rail
   than to a set of floating cards. */
.panel {
  background: var(--panel-bg);
  border: 0;
  border-bottom: 1px solid var(--border-strong);
  border-radius: 0;
  padding: 8px 10px 10px;
  margin: 0;
}

.panel h2 {
  font-size: 9.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: #9aa4b2;
  margin: -10px -12px 10px;
  padding: 6px 12px 6px 10px;
  background: var(--panel-header);
  border-bottom: 1px solid var(--border);
  border-left: 2px solid var(--accent);
}

.field-label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin: 10px 0 4px 0;
}

.field-label:first-child {
  margin-top: 0;
}

.seed-buttons {
  display: flex;
  gap: 6px;
}

.seed-buttons button {
  flex: 1;
}

/* Collapsible tool sections, so the rail shows controls rather than a wall of options. */
.tool-group > summary {
  cursor: pointer;
  list-style: none;
  user-select: none;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  padding: 5px 0;
}

.tool-group > summary::-webkit-details-marker { display: none; }

.tool-group > summary::before {
  content: "\25B8";
  display: inline-block;
  margin-right: 6px;
  color: var(--accent);
  transition: transform 0.12s ease;
}

.tool-group[open] > summary::before { transform: rotate(90deg); }

.tool-body {
  padding-top: 6px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
  margin-bottom: 8px;
}

.tool-btn {
  width: 100%;
  margin: 0;
  padding: 6px 4px;
  font-size: 11px;
  background: #1a202a;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
}

.tool-btn:hover:not(.active) { background: #222a36; color: var(--text); }

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

/* Live indicator that clicks will edit the mask rather than move the crosshair. */
.paint-badge {
  position: absolute;
  top: 10px;
  left: 12px;
  padding: 4px 9px;
  background: rgba(47, 129, 214, 0.92);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  border-radius: 3px;
  pointer-events: none;
  letter-spacing: 0.02em;
}

.paint-badge[hidden] { display: none; }

.cursor-readout {
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
  color: #cfd6e2;
  text-align: right;
  white-space: pre-line;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.95);
  pointer-events: none;
}

.cursor-readout[hidden] { display: none; }

.niivue-container.painting { cursor: crosshair; }
.niivue-container.panning { cursor: grabbing; }

.zoom-slider { max-width: 120px; flex: 0 0 auto; }

#zoomLabel {
  min-width: 42px;
  font-family: var(--mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
}

.copyright { opacity: 0.85; }

.app-version {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-dim);
  white-space: nowrap;
  opacity: 0.8;
}

.link-btn {
  width: auto;
  margin: 0 0 0 14px;
  padding: 0;
  background: none;
  border: 0;
  color: var(--accent-bright);
  font-size: 11px;
  font-weight: 500;
  text-decoration: underline;
  cursor: pointer;
}

.link-btn:hover { color: #6ec3d8; background: none; }

.attrib-body {
  max-height: 58vh;
  overflow-y: auto;
  font-size: 12.5px;
  line-height: 1.6;
  color: #b9c1cd;
}

.attrib-body h3 {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-dim);
  margin: 16px 0 6px;
}

.attrib-body h3:first-child { margin-top: 0; }
.attrib-body ul { margin: 0; padding-left: 18px; }
.attrib-body li { margin-bottom: 7px; }
.attrib-body a { color: var(--accent-bright); }
.attrib-body code {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text);
}

.attrib-note {
  margin-top: 14px;
  font-size: 11.5px !important;
  color: var(--text-dim) !important;
}

.phase-row {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.full-select {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 6px;
  font-size: 12px;
}

.or-divider {
  text-align: center;
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  margin: 8px 0;
}

.model-row, .toggle-row, .slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 7px;
  font-size: 12px;
}

.toggle-row input[type="checkbox"] {
  accent-color: var(--accent);
  margin: 0;
}

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

.slider-row input[type="range"] {
  flex: 1;
}

.slider-row span {
  min-width: 34px;
  text-align: right;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}

.kidney-swatch { background: var(--kidney-color); }
.tumor-swatch { background: var(--tumor-color); }
.cyst-swatch { background: var(--cyst-color); }

input[type="file"] {
  width: 100%;
  font-size: 11px;
  color: var(--text-dim);
}

/* Sidebar scrollbar sized like a tool rail rather than an OS default. */
.sidebar::-webkit-scrollbar { width: 9px; }
.sidebar::-webkit-scrollbar-track { background: var(--bg); }
.sidebar::-webkit-scrollbar-thumb {
  background: #2b333f;
  border: 2px solid var(--bg);
  border-radius: 5px;
}
.sidebar::-webkit-scrollbar-thumb:hover { background: #3a4453; }

button {
  width: 100%;
  padding: 5px 10px;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  margin-top: 4px;
}

button:hover:not(:disabled) { background: var(--accent-bright); border-color: var(--accent-bright); }
button:active:not(:disabled) { transform: translateY(1px); }

button:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 1px;
}

button:disabled {
  background: #1a1f27;
  border-color: var(--border);
  color: #59616e;
  cursor: not-allowed;
}

button.secondary {
  background: #1a202a;
  border: 1px solid var(--border-strong);
  color: var(--text);
}

button.secondary:hover:not(:disabled) { background: #222a36; border-color: #3d4757; }

button.secondary:disabled { background: #151a21; color: #59616e; }

/* Collapsed by default so the sidebar reads as controls, not documentation. */
.more-info {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
  margin: 6px 0;
}

.more-info > summary {
  cursor: pointer;
  color: var(--accent);
  list-style: none;
  user-select: none;
}

.more-info > summary::-webkit-details-marker { display: none; }

.more-info > summary::before {
  content: "\25B8";           /* right-pointing triangle; rotates when open */
  display: inline-block;
  margin-right: 5px;
  transition: transform 0.12s ease;
}

.more-info[open] > summary::before { transform: rotate(90deg); }

.more-info[open] > summary { margin-bottom: 5px; }

.info-block {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 6px;
  line-height: 1.5;
  word-break: break-word;
}

/* Measurements read as instrument output, not prose: tabular figures, monospaced. */
#seedInfo, #seedResult, #runStatus {
  font-family: var(--mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  background: #0d1116;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 6px 8px;
}

#seedInfo:empty, #seedResult:empty, #runStatus:empty { display: none; }

progress {
  width: 100%;
  margin-top: 8px;
  height: 6px;
}

.viewer-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.niivue-container {
  position: relative;
  flex: 1;
  min-height: 0;
  background: #000;
}

#niivueCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.viewer-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 14px;
  pointer-events: none;
}

.viewer-placeholder[hidden] {
  display: none;
}

/* ---- Corner annotations ---- */

.corner-annotation {
  position: absolute;
  bottom: 10px;
  left: 12px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.55;
  color: #cfd6e2;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.95);
  pointer-events: none;
  max-width: 46%;
  white-space: pre-line;
}

.corner-annotation-right {
  left: auto;
  right: 12px;
  text-align: right;
}

.corner-annotation[hidden] { display: none; }

.corner-annotation .anno-primary {
  color: #ffffff;
  font-weight: 600;
  font-size: 12px;
}

/* Patient identity block only. The series/acquisition block on the right stays neutral,
   so colour continues to mean "this is who the images belong to". */
#patientAnnotation {
  color: var(--anno-green);
}

#patientAnnotation .anno-primary {
  color: var(--anno-green);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.95);
}

.corner-annotation .anno-dim { color: #8f99a8; }

/* ---- Segmentation progress ---- */

.progress-overlay {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  width: min(620px, calc(100% - 48px));
  padding: 12px 16px 11px;
  background: rgba(12, 16, 21, 0.94);
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.55);
}

.progress-overlay[hidden] { display: none; }

.progress-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 8px;
}

.progress-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
}

.progress-pct {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent-bright);
}

.progress-track {
  height: 8px;
  background: #0a0d11;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  transition: width 0.25s ease;
}

.progress-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 7px;
  font-family: var(--mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
}

.slice-scrubber-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  border-top: 1px solid var(--border-strong);
  background: var(--panel-header);
}

.slice-scrubber-row label {
  color: var(--text-dim);
  font-size: 12px;
}

.slice-scrubber-row select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 6px;
  font-size: 12px;
}

.slice-scrubber-row input[type="range"] {
  flex: 1;
}

#sliceLabel {
  min-width: 66px;
  text-align: right;
  color: var(--text);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
}

.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  height: 30px;
  padding: 0 14px;
  border-top: 1px solid var(--border-strong);
  background: var(--panel-header);
  color: var(--text-dim);
  font-size: 11px;
}

#statusBar {
  font-family: var(--mono);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.disclaimer {
  color: var(--danger);
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

@media (max-width: 1150px) {
  /* Keep the regulatory statement, drop the elaboration, before anything wraps away. */
  .disclaimer .disclaimer-long { display: none; }
}

.credit {
  color: var(--text);
  white-space: nowrap;
}

.error-text {
  color: var(--danger);
}

/* ---- Research-use acknowledgement ---- */

body.modal-open { overflow: hidden; }

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(5, 7, 10, 0.82);
  backdrop-filter: blur(3px);
}

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

.modal-card {
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--panel-bg);
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.6);
  padding: 0 22px 20px;
}

.modal-band {
  margin: 0 -22px 16px;
  padding: 8px 22px;
  background: var(--danger);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: 4px 4px 0 0;
}

.modal-card h2 {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}

.modal-card p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.6;
  color: #b9c1cd;
}

.modal-list {
  margin: 0 0 14px;
  padding-left: 18px;
  font-size: 12.5px;
  line-height: 1.65;
  color: #b9c1cd;
}

.modal-privacy {
  border-left: 2px solid var(--border-strong);
  padding-left: 10px;
  font-size: 12px !important;
  color: var(--text-dim) !important;
}

.modal-remember {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 16px 0 14px;
  font-size: 12.5px;
  color: var(--text-dim);
  cursor: pointer;
}

#disclaimerAccept {
  margin-top: 0;
  padding: 10px;
  font-size: 13px;
}


/* ---- Basic mode ----
   Everything except the guided panel is hidden, so the app presents one path:
   pick a scan, wait, download. Advanced mode restores the full tool rail. */

body.mode-basic .panel:not(.basic-panel) { display: none; }
body.mode-advanced .basic-panel { display: none; }

.mode-switch { margin-left: 0; }

.mode-btn {
  width: auto;
  margin: 0;
  padding: 3px 10px;
  background: transparent;
  border: 0;
  border-radius: 0;
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 600;
}

.mode-btn + .mode-btn { border-left: 1px solid var(--border-strong); }
.mode-btn.active { background: var(--accent); color: #fff; }
.mode-btn:hover:not(.active) { background: #1d232c; color: var(--text); }

.basic-step {
  display: flex;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.basic-step:last-of-type { border-bottom: 0; }

.basic-step-num {
  flex: 0 0 22px;
  height: 22px;
  border-radius: 50%;
  background: #1a202a;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* The step currently in play is the only one highlighted, so the eye knows where to look. */
.basic-step.active .basic-step-num {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.basic-step.done .basic-step-num {
  background: transparent;
  border-color: var(--anno-green);
  color: var(--anno-green);
}

.basic-step-body { flex: 1; min-width: 0; }

.basic-step-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 7px;
}

.basic-step.pending .basic-step-title { color: var(--text-dim); }

#basicStatus {
  font-family: var(--mono);
  font-size: 11px;
  background: #0d1116;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 6px 8px;
  margin-top: 0;
}

.sample-btn {
  width: auto;
  margin-top: 8px;
  padding: 4px 10px;
  font-size: 11px;
  background: #1a202a;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
}

.sample-btn:hover:not(:disabled) { background: #222a36; color: var(--text); }


/* ---- Imaging toolbar ----
   The single most recognisable thing about a reading station: a dense strip of icon tools
   directly above the image, grouped by function with hairline separators. It drives the
   same controls the sidebar does rather than duplicating any logic. */

.toolbar {
  display: flex;
  align-items: center;
  gap: 2px;
  height: 34px;
  padding: 0 6px;
  background: var(--toolbar);
  border-bottom: 1px solid var(--border-strong);
  flex-wrap: nowrap;
  overflow-x: auto;
}

.tb-sep {
  width: 1px;
  height: 20px;
  background: var(--border-strong);
  margin: 0 5px;
  flex: 0 0 auto;
}

.tb-btn {
  width: auto;
  flex: 0 0 auto;
  margin: 0;
  padding: 0;
  height: 26px;
  min-width: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 2px;
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 500;
}

.tb-btn svg { width: 15px; height: 15px; display: block; }
.tb-btn:hover:not(:disabled) { background: #383838; color: var(--text); border-color: var(--border-strong); }
.tb-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.tb-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.tb-btn.has-label { padding: 0 7px; }

.tb-select {
  height: 26px;
  background: #1e1e1e;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 2px;
  font-size: 11px;
  padding: 0 5px;
  flex: 0 0 auto;
  max-width: 190px;
}

.tb-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-dim);
  margin: 0 5px 0 2px;
  flex: 0 0 auto;
}

.tb-readout {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  white-space: nowrap;
  padding-left: 10px;
  flex: 0 0 auto;
}

.tb-zoom { width: 92px; flex: 0 0 auto; }

/* Four-corner annotation, as on any reading station. */
.corner-annotation.corner-tl { top: 10px; bottom: auto; left: 12px; }
.corner-annotation.corner-tr { top: 10px; bottom: auto; left: auto; right: 12px; text-align: right; }