:root {
  --bg: #14181d; --panel: #1c2229; --panel2: #232b34; --ink: #dfe6ee; --muted: #93a1b0;
  --accent: #3ea6ff; --ok: #35c07a; --warn: #e0a63a; --err: #e05555; --line: #2d3743;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink); font: 13px/1.35 system-ui, -apple-system, "Segoe UI", sans-serif; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 11.5px; }
.err { color: var(--err); min-height: 16px; margin-top: 6px; }
.spacer { flex: 1; }

#app { height: 100vh; }
.view { height: 100%; display: flex; flex-direction: column; }

/* login */
.login-card { max-width: 360px; margin: 10vh auto; background: var(--panel); padding: 24px; border-radius: 10px; border: 1px solid var(--line); }
.login-card h1 { font-size: 18px; margin: 0 0 4px; }
.login-card label { display: block; margin: 12px 0 5px; color: var(--muted); }
.login-card input { width: 100%; padding: 8px 10px; background: var(--bg); border: 1px solid var(--line); color: var(--ink); border-radius: 6px; }

button { background: var(--panel2); border: 1px solid var(--line); color: var(--ink); padding: 5px 10px; border-radius: 6px; cursor: pointer; font-size: 12.5px; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: #06131f; border-color: var(--accent); font-weight: 600; }
button.primary:disabled { opacity: .4; cursor: default; }
button.ghost { background: transparent; }
button.active { border-color: var(--accent); color: var(--accent); }

/* topbar */
.topbar { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; padding: 6px 12px; border-bottom: 1px solid var(--line); background: var(--panel); font-size: 12.5px; }
.topbar .brand { font-weight: 700; }
.topbar .center { display: flex; align-items: center; gap: 8px; }
.topbar .right { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.pill { background: var(--panel2); border: 1px solid var(--line); padding: 2px 9px; border-radius: 999px; font-size: 11.5px; }
.warn-pill { background: #3a2b12; color: var(--warn); border: 1px solid #5a4318; padding: 2px 9px; border-radius: 999px; font-size: 11.5px; }
#wl-preset { background: var(--bg); border: 1px solid var(--line); color: var(--ink); border-radius: 5px; padding: 3px 6px; font-size: 12px; }

/* viewers — fill the screen, axial + coronal, two big panels */
.viewer-row { flex: 1 1 auto; min-height: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 8px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 5px; display: flex; flex-direction: column; min-height: 0; }
.panel-head { flex: 0 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 1px 4px 5px; font-size: 12.5px; }
.ct-tag { font-weight: 700; letter-spacing: .04em; }
.wl { color: var(--muted); font-size: 11.5px; }
.panes { flex: 1 1 auto; min-height: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.pane { position: relative; background: #000; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; min-height: 0; }
.pane canvas { display: block; width: 100%; height: 100%; cursor: crosshair; }
.pane .plane-label { position: absolute; left: 5px; top: 3px; font-size: 11px; color: #cfe3f5; text-shadow: 0 0 4px #000; }
.pane .slice-label { position: absolute; right: 5px; bottom: 3px; font-size: 11px; color: #cfe3f5; text-shadow: 0 0 4px #000; }
.pane .loaderr { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--err); font-size: 12px; }

/* form — compact */
.formbar { flex: 0 0 auto; margin: 0 8px 10px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 5px 12px; font-size: 12.5px; }
.qrow { display: flex; align-items: center; gap: 12px; padding: 4px 0; border-bottom: 1px solid #232b34; }
.qrow:last-of-type { border-bottom: 0; }
.qtext { font-weight: 600; font-size: 12.5px; }
.answer button { margin-right: 6px; }
.answer button.sel { background: var(--accent); color: #06131f; border-color: var(--accent); font-weight: 700; }
#optional-box { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 8px 0 4px; }
.opt-title { font-weight: 600; margin-bottom: 4px; font-size: 12.5px; }
.checklist label { display: block; padding: 2px 0; font-size: 12.5px; }
.checklist input { margin-right: 7px; }
.opt-note { grid-column: 1 / -1; }

/* review + admin */
.review-wrap, .admin-wrap { padding: 12px; overflow: auto; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); font-size: 12.5px; }
th { color: var(--muted); font-weight: 600; }
.tabs { display: flex; gap: 8px; margin-bottom: 10px; }
.admin-card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px; margin-bottom: 12px; }
.admin-card h3 { margin: 0 0 8px; font-size: 14px; }
.admin-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; }
input, select, textarea { font: inherit; }
.admin-card input, .admin-card select { background: var(--bg); border: 1px solid var(--line); color: var(--ink); border-radius: 6px; padding: 6px 8px; }
.kv { color: var(--muted); font-size: 11.5px; }

/* slide-in + modals */
.slidein { position: fixed; top: 0; right: 0; height: 100%; width: 310px; background: var(--panel); border-left: 1px solid var(--line); padding: 16px; overflow: auto; z-index: 40; }
.slidein h2 { font-size: 15px; margin: 0 0 10px; }
.ref-group { margin-bottom: 10px; }
.ref-title { color: var(--accent); font-weight: 600; margin-bottom: 3px; font-size: 12.5px; }
.ref-group ul { margin: 0; padding-left: 18px; font-size: 12.5px; }
.modal { position: fixed; inset: 0; background: rgba(5, 10, 16, .72); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal-card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 20px; max-width: 600px; font-size: 13px; }
.modal-card label { display: block; margin: 9px 0; color: var(--muted); }
.modal-card select, .modal-card textarea { width: 100%; background: var(--bg); border: 1px solid var(--line); color: var(--ink); border-radius: 6px; padding: 7px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 12px; }
.toast { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); background: var(--panel2); border: 1px solid var(--accent); padding: 8px 14px; border-radius: 8px; z-index: 60; font-size: 12.5px; }
.toast.bad { border-color: var(--err); }