:root {
  --bg: #0f172a;
  --panel: #1a2338;
  --panel2: #232f4a;
  --line: #2f3d5c;
  --text: #e6ecf7;
  --muted: #93a1c0;
  --accent: #4f8cff;
  --accent2: #2c6be0;
  --danger: #ff5a5a;
  --ok: #35c184;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}
button { font-family: inherit; cursor: pointer; }
h1, h3 { margin: 0; }

.screen { display: none; height: 100vh; }
.screen.active { display: block; }

/* ── select screen ─────────────────────────────────────────── */
#screen-select { display: none; overflow-y: auto; }
#screen-select.active { display: flex; align-items: flex-start; justify-content: center; }
.select-card {
  width: min(680px, 92vw);
  margin: 6vh 0 4vh;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 32px 34px 36px;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.select-card h1 { font-size: 26px; }
.select-card .sub { color: var(--muted); margin: 6px 0 22px; }
.field { margin-bottom: 22px; }
.field > label {
  display: block; font-size: 12px; letter-spacing: .06em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 10px;
}
.pick-row { display: flex; gap: 12px; flex-wrap: wrap; }
.pick {
  flex: 1 1 200px; text-align: left;
  background: var(--panel2); color: var(--text);
  border: 1.5px solid var(--line); border-radius: 12px;
  padding: 14px 16px; font-size: 16px; font-weight: 600;
  transition: border-color .12s, background .12s;
}
.pick span { display: block; font-size: 12px; font-weight: 400; color: var(--muted); margin-top: 4px; }
.pick:hover { border-color: var(--accent); }
.pick.active { border-color: var(--accent); background: #24365c; }
.muted { color: var(--muted); }

.config-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.config-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--panel2); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 12px;
}
.config-row .cfg-label { font-weight: 600; }
.config-row .cfg-meta { color: var(--muted); font-size: 12px; }
.config-row .spacer { flex: 1; }
.config-row button { border: none; border-radius: 8px; padding: 7px 12px; font-size: 13px; font-weight: 600; }
.config-row .load { background: var(--accent2); color: #fff; }
.config-row .del { background: transparent; color: var(--danger); border: 1px solid #593; border-color: #5b2b3a; }
.config-empty { color: var(--muted); font-size: 14px; padding: 4px 2px; }

.new-row { display: flex; gap: 10px; }
.new-row input {
  flex: 1; background: var(--panel2); border: 1px solid var(--line);
  color: var(--text); border-radius: 10px; padding: 11px 13px; font-size: 14px;
}
.new-row input:focus { outline: none; border-color: var(--accent); }

button.primary { background: var(--accent2); color: #fff; border: none; border-radius: 10px; padding: 11px 16px; font-weight: 600; font-size: 14px; }
button.primary:hover { background: var(--accent); }
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); border-radius: 9px; padding: 8px 12px; font-size: 13px; }
button.ghost:hover { color: var(--text); border-color: var(--accent); }
button.ghost.danger:hover { color: var(--danger); border-color: var(--danger); }
.error { color: var(--danger); font-size: 13px; }

/* ── annotate screen ───────────────────────────────────────── */
.topbar {
  height: 52px; display: flex; align-items: center; gap: 14px;
  padding: 0 16px; background: var(--panel); border-bottom: 1px solid var(--line);
}
.crumbs { color: var(--muted); font-size: 14px; }
.crumbs #crumb-tool, .crumbs #crumb-subject { color: var(--text); font-weight: 600; }
.label-chip { background: var(--panel2); border: 1px solid var(--line); padding: 3px 9px; border-radius: 20px; color: var(--text) !important; font-size: 12px; }
.topbar .spacer { flex: 1; }
.save-status { font-size: 12px; color: var(--muted); }

.workspace { display: flex; height: calc(100vh - 52px); }
.toolbar { width: 232px; flex-shrink: 0; background: var(--panel); border-right: 1px solid var(--line); padding: 14px; overflow-y: auto; }
.results { width: 268px; flex-shrink: 0; background: var(--panel); border-left: 1px solid var(--line); padding: 14px 16px; overflow-y: auto; }

.side-toggle { display: flex; margin-bottom: 14px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.side-toggle button { flex: 1; background: var(--panel2); color: var(--muted); border: none; padding: 9px; font-weight: 600; }
.side-toggle button.active { background: var(--accent2); color: #fff; }

#landmark-buttons { display: flex; flex-direction: column; gap: 6px; }
.lm-group-title { font-size: 11px; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); margin: 10px 2px 2px; }
.lm-btn {
  display: flex; align-items: center; gap: 9px; width: 100%; text-align: left;
  background: var(--panel2); color: var(--text); border: 1.5px solid var(--line);
  border-radius: 9px; padding: 9px 11px; font-size: 13px; font-weight: 500;
}
.lm-btn:hover { border-color: var(--accent); }
.lm-btn.active { border-color: var(--accent); background: #24365c; }
.lm-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; box-shadow: 0 0 0 1px rgba(255,255,255,.15) inset; }
.lm-btn .lm-name { flex: 1; }
.lm-btn .lm-state { font-size: 11px; color: var(--muted); }
.lm-btn.set .lm-state { color: var(--ok); }

.tool-actions { display: flex; gap: 8px; margin-top: 16px; }
.tool-actions button { flex: 1; }
.hint { font-size: 11.5px; color: var(--muted); line-height: 1.5; margin-top: 14px; }

.panels { flex: 1; display: flex; position: relative; min-width: 0; background: #0b1120; }
.panel { flex: 1 1 50%; position: relative; min-width: 0; border-right: 1px solid var(--line); }
.panel:last-child { border-right: none; }
.panel canvas { display: block; width: 100%; height: 100%; }
.panel-tag {
  position: absolute; top: 10px; left: 10px; z-index: 2;
  background: rgba(15,23,42,.78); color: var(--text); font-size: 12px; font-weight: 600;
  padding: 4px 10px; border-radius: 20px; border: 1px solid var(--line);
}
.viewer-loading {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(11,17,32,.85); color: var(--muted); font-size: 15px; z-index: 3;
}
.viewer-loading[hidden] { display: none; }

.results h3 { font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin: 6px 0 10px; }
.results h3:not(:first-child) { margin-top: 22px; }
#checklist { display: flex; flex-direction: column; gap: 5px; }
.chk { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.chk .chk-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); flex-shrink: 0; }
.chk.done .chk-dot { background: var(--ok); }
.chk .chk-name { flex: 1; color: var(--muted); }
.chk.done .chk-name { color: var(--text); }
.chk .chk-val { font-size: 11px; color: var(--muted); }

.angles { display: flex; flex-direction: column; gap: 4px; }
.angle-row { display: flex; justify-content: space-between; font-size: 13px; padding: 4px 0; border-bottom: 1px solid var(--line); }
.angle-row .a-name { color: var(--muted); }
.angle-row .a-val { font-weight: 700; font-variant-numeric: tabular-nums; }
.angle-sub { font-size: 11px; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); margin: 12px 0 2px; }
.angles-empty { color: var(--muted); font-size: 13px; }