:root {
  --bg: #e7ebef;
  --panel-bg: #ffffff;
  --border: #dfe3e8;
  --accent: #2f6df6;
  --accent-soft: #eaf1ff;
  --text: #2f3a48;
  --muted: #8a94a3;
  --danger: #e5484d;
  --station: #b8560f;
  --measure: #c0208a;
  --shadow: 0 6px 24px rgba(20, 30, 50, 0.12);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--text); background: var(--bg); font-size: 14px; }

.app { display: flex; height: 100vh; overflow: hidden; }
.muted { color: var(--muted); } .small { font-size: 12px; }

/* ---------------- LEFT ---------------- */
.left { flex: 0 0 232px; background: var(--panel-bg); border-right: 1px solid var(--border); display: flex; flex-direction: column; z-index: 10; box-shadow: var(--shadow); }
.canvases { flex: 1; overflow-y: auto; padding: 12px; }
.canvases-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); font-weight: 700; }
.canvases-actions { display: flex; gap: 6px; margin-bottom: 8px; }
.canvases-actions .tab-add { flex: 1; }
.canvas-list { display: flex; flex-direction: column; gap: 6px; }

.cat-header { display: flex; align-items: center; gap: 6px; margin-top: 6px; padding: 4px 6px; font-size: 10px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); font-weight: 700; border-radius: 6px; }
.cat-header .cat-nm { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cat-header .cat-del { border: none; background: none; color: var(--muted); opacity: 0.5; cursor: pointer; font-size: 13px; padding: 0; }
.cat-header .cat-del:hover { opacity: 1; color: var(--danger); }
.cat-header.drag-over { background: var(--accent-soft); color: var(--accent); }

.canvas-item { display: flex; align-items: center; gap: 4px; padding: 7px 8px; border: 1px solid var(--border); border-radius: 8px; background: #f6f8fb; cursor: pointer; font-size: 13px; position: relative; }
.canvas-item.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }
.canvas-item .grip { display: flex; align-items: center; color: var(--muted); cursor: grab; flex: 0 0 auto; opacity: 0.55; }
.canvas-item .grip:hover { opacity: 1; }
.canvas-item .grip:active { cursor: grabbing; }
.canvas-item .nm { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.canvas-item .cv-dup, .canvas-item .cv-del { border: none; background: none; color: inherit; opacity: 0; cursor: pointer; font-size: 13px; padding: 0 2px; flex: 0 0 auto; }
.canvas-item:hover .cv-dup, .canvas-item:hover .cv-del, .canvas-item.active .cv-dup, .canvas-item.active .cv-del { opacity: 0.5; }
.canvas-item .cv-dup:hover { opacity: 1; color: var(--accent); }
.canvas-item .cv-del:hover { opacity: 1; color: var(--danger); }
.canvas-item.drag-over-top { box-shadow: inset 0 2px 0 var(--accent); }
.canvas-item.drag-over-bottom { box-shadow: inset 0 -2px 0 var(--accent); }
.canvas-item.dragging { opacity: 0.4; }

.left-foot { border-top: 1px solid var(--border); padding: 10px 12px; }

/* ---------------- CENTER ---------------- */
.stage { flex: 1; position: relative; display: flex; align-items: center; justify-content: center; overflow: hidden; padding: 40px 40px 40px 74px; min-width: 0; }
.canvas { position: relative; flex: 0 0 auto; }
.canvas-empty { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 13px; text-align: center; }
.ground { position: absolute; left: -40px; right: -40px; bottom: 0; border-bottom: 1px solid #c3ccd6; pointer-events: none; }

.cv-item { position: absolute; transform: translate(-50%, -50%) rotate(var(--rot, 0deg)); cursor: grab; touch-action: none; user-select: none; line-height: 0; }
.cv-item svg { width: 100%; height: 100%; display: block; pointer-events: none; }
.cv-item.station { filter: drop-shadow(0 6px 16px rgba(20,30,50,0.16)); cursor: pointer; z-index: 1; }
.cv-item.sticker { z-index: 2; }
.cv-item.selected { outline: 1.5px solid var(--accent); outline-offset: 2px; }
.cv-item.dragging { cursor: grabbing; }
.cv-item .rm { position: absolute; top: -9px; right: -9px; width: 18px; height: 18px; border-radius: 50%; border: none; background: var(--danger); color: #fff; font-size: 12px; line-height: 18px; text-align: center; cursor: pointer; display: none; padding: 0; box-shadow: 0 2px 6px rgba(0,0,0,0.25); z-index: 3; }
.cv-item.selected .rm, .cv-item:hover .rm { display: block; }

/* Guides */
.guide-line { position: absolute; pointer-events: auto; z-index: 2; }
.guide-line.h { left: -40px; right: -40px; top: 0; border-top: 1px dashed var(--accent); height: 9px; transform: translateY(-4.5px); cursor: ns-resize; }
.guide-line.v { top: -20px; bottom: 0; left: 0; border-left: 1px dashed var(--station); width: 9px; transform: translateX(-4.5px); cursor: ew-resize; }
.guide-label { position: absolute; font-size: 10px; font-weight: 600; white-space: nowrap; background: rgba(255,255,255,0.9); padding: 0 3px; border-radius: 3px; pointer-events: none; }
.guide-label.h { left: 0; top: -8px; color: var(--accent); }
.guide-label.v { top: 2px; left: 3px; color: var(--station); }

.sel-info { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); background: rgba(47,58,72,0.94); color: #fff; font-size: 12px; padding: 6px 12px; border-radius: 999px; white-space: nowrap; z-index: 20; box-shadow: 0 4px 14px rgba(0,0,0,0.25); }
.sel-info a.sel-link { color: #8fd0ff; text-decoration: none; }
.sel-info a.sel-link:hover { text-decoration: underline; }
.sel-info select.sel-replace { background: #fff; color: var(--text); border: none; border-radius: 6px; font-size: 11px; padding: 2px 4px; margin-left: 2px; }
.sel-info button.sel-move { background: #fff; color: var(--text); border: none; border-radius: 6px; font-size: 11px; line-height: 1; padding: 3px 7px; margin-left: 3px; cursor: pointer; }
.sel-info button.sel-move:hover { background: var(--accent); color: #fff; }

/* ---------------- Measure tool (dimension) ---------------- */
.measure { position: absolute; inset: 0; pointer-events: none; z-index: 6; }
.measure .m-dim, .measure .m-ext, .measure .m-label, .measure .m-h { position: absolute; }
.measure .m-dim { background: var(--measure); }
.measure.v .m-dim { width: 1.5px; transform: translateX(-50%); }
.measure.h .m-dim { height: 1.5px; transform: translateY(-50%); }
/* arrowheads on the dimension line (double-headed, pointing outward) */
.measure .m-dim::before, .measure .m-dim::after { content: ''; position: absolute; }
.measure.v .m-dim::before, .measure.v .m-dim::after { left: 50%; transform: translateX(-50%); border-left: 4px solid transparent; border-right: 4px solid transparent; }
.measure.v .m-dim::before { top: 0; border-bottom: 6px solid var(--measure); }
.measure.v .m-dim::after { bottom: 0; border-top: 6px solid var(--measure); }
.measure.h .m-dim::before, .measure.h .m-dim::after { top: 50%; transform: translateY(-50%); border-top: 4px solid transparent; border-bottom: 4px solid transparent; }
.measure.h .m-dim::before { left: 0; border-right: 6px solid var(--measure); }
.measure.h .m-dim::after { right: 0; border-left: 6px solid var(--measure); }
.measure.v .m-ext { border-top: 1.4px dashed var(--measure); transform: translateY(-50%); }
.measure.h .m-ext { border-left: 1.4px dashed var(--measure); transform: translateX(-50%); }
.measure .m-label { font-size: 12px; font-weight: 700; color: var(--measure); background: rgba(255,255,255,0.92); padding: 1px 5px; border-radius: 5px; white-space: nowrap; pointer-events: none; }
.measure.v .m-label { transform: translate(calc(-100% - 8px), -50%); }
.measure.h .m-label { transform: translate(-50%, calc(-100% - 8px)); }
.measure .m-h { width: 13px; height: 13px; border-radius: 50%; transform: translate(-50%, -50%); pointer-events: auto; background: #fff; border: 1.5px solid var(--measure); box-shadow: 0 1px 3px rgba(0,0,0,0.2); }
.measure .m-h.pos { cursor: move; background: var(--measure); }
.measure .m-h.exta, .measure .m-h.extb { width: 10px; height: 10px; border-style: dashed; }
.measure.v .m-h.a, .measure.v .m-h.b { cursor: ns-resize; }
.measure.h .m-h.a, .measure.h .m-h.b { cursor: ew-resize; }
.measure.v .m-h.exta, .measure.v .m-h.extb { cursor: ew-resize; }
.measure.h .m-h.exta, .measure.h .m-h.extb { cursor: ns-resize; }

/* Drag ghost */
.ghost { position: fixed; transform: translate(-50%, -50%); pointer-events: none; z-index: 1000; opacity: 0.85; line-height: 0; filter: drop-shadow(0 6px 12px rgba(0,0,0,0.3)); }
.ghost svg { width: 100%; height: 100%; display: block; }

/* ---------------- RIGHT ---------------- */
.right { flex: 0 0 300px; background: var(--panel-bg); border-left: 1px solid var(--border); box-shadow: var(--shadow); display: flex; flex-direction: column; overflow-y: auto; z-index: 10; }

/* Segmented mode switcher with sliding pill */
.seg { position: relative; display: flex; margin: 14px 16px 8px; background: #eef1f5; border-radius: 10px; padding: 3px; }
.seg-btn { flex: 1; position: relative; z-index: 1; border: none; background: transparent; padding: 7px 4px; font-size: 12.5px; font-weight: 600; color: var(--muted); cursor: pointer; border-radius: 8px; }
.seg-btn.active { color: var(--accent); }
.seg-pill { position: absolute; top: 3px; bottom: 3px; left: 3px; width: calc((100% - 6px) / 3); background: #fff; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.12); transition: transform 0.2s ease; }

.panel-mode { padding: 12px 18px 16px; border-bottom: 1px solid var(--border); }
.panel-mode[hidden] { display: none; }
.panel-mode h2 { margin: 0 0 6px; font-size: 15px; }
.panel-mode > p { margin: 0 0 12px; }

.field { display: flex; flex-direction: column; gap: 4px; margin: 8px 0; }
.field > span { font-size: 11px; color: var(--muted); }
.field input { padding: 7px 8px; border: 1px solid var(--border); border-radius: 8px; font: inherit; color: var(--text); background: #fff; width: 100%; }
.field input:focus { outline: none; border-color: var(--accent); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 8px 10px; font-size: 13px; border-radius: 8px; border: 1px solid var(--accent); background: var(--accent); color: #fff; cursor: pointer; text-align: center; }
.btn:hover { filter: brightness(1.05); }
.btn.ghostbtn { background: #fff; color: var(--text); border-color: var(--border); }
.btn.ghostbtn:hover { border-color: var(--accent); color: var(--accent); }
.btn.small { padding: 6px 8px; font-size: 12px; }
.filelabel { cursor: pointer; }
.tab-add { border: 1px dashed var(--border); background: #fff; border-radius: 7px; padding: 4px 8px; cursor: pointer; color: var(--accent); font-size: 12px; }
.btnrow { display: flex; gap: 8px; flex-wrap: wrap; }
.btnrow .btn { flex: 1; }

details.up { margin-top: 10px; border: 1px dashed var(--border); border-radius: 8px; padding: 8px 10px; }
details.up summary { cursor: pointer; font-size: 12px; color: var(--accent); font-weight: 600; }
details.up[open] summary { margin-bottom: 6px; }

/* Library cards (stations + stickers) — editable name & height */
.lib-list { display: flex; flex-direction: column; gap: 8px; }
.lib-card { position: relative; padding: 8px; border: 1px solid var(--border); border-radius: 10px; background: #f6f8fb; cursor: grab; touch-action: none; user-select: none; }
.lib-card .lib-top { display: flex; align-items: center; gap: 10px; }
.lib-card .thumb { width: 38px; height: 46px; display: flex; align-items: center; justify-content: center; flex: 0 0 auto; }
.lib-card .thumb svg { max-width: 100%; max-height: 100%; }
.lib-card .meta { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.lib-card .nm-input { border: 1px solid transparent; background: transparent; font: inherit; font-size: 12px; font-weight: 600; padding: 2px 4px; border-radius: 6px; width: 100%; color: var(--text); }
.lib-card .nm-input:hover { border-color: var(--border); background: #fff; }
.lib-card .nm-input:focus { outline: none; border-color: var(--accent); background: #fff; }
.lib-card .h-row { display: flex; align-items: center; gap: 4px; font-size: 11px; color: var(--muted); }
.lib-card .h-input { width: 70px; border: 1px solid transparent; background: transparent; font: inherit; font-size: 11px; padding: 2px 4px; border-radius: 6px; color: var(--text); }
.lib-card .h-input:hover { border-color: var(--border); background: #fff; }
.lib-card .h-input:focus { outline: none; border-color: var(--accent); background: #fff; }
.lib-card .lib-del { position: absolute; top: -7px; right: -7px; width: 18px; height: 18px; border-radius: 50%; border: none; background: var(--danger); color: #fff; font-size: 12px; line-height: 18px; cursor: pointer; display: none; padding: 0; }
.lib-card:hover .lib-del { display: block; }
.lib-card .add { margin-top: 8px; width: 100%; border: 1px solid var(--accent); background: var(--accent); color: #fff; border-radius: 7px; padding: 6px; font-size: 12px; cursor: pointer; }
.lib-card .add:hover { filter: brightness(1.05); }
.lib-card .asset-link { margin-top: 8px; display: flex; align-items: center; gap: 6px; font-size: 11px; }
.lib-card .asset-link a { color: var(--accent); text-decoration: none; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; }
.lib-card .asset-link a:hover { text-decoration: underline; }
.lib-card .asset-link button { border: 1px dashed var(--border); background: #fff; color: var(--muted); cursor: pointer; font-size: 11px; padding: 3px 7px; border-radius: 6px; }
.lib-card .asset-link button:hover { color: var(--accent); border-color: var(--accent); }

/* Inline rename (canvas names) */
.inline-edit { border: 1px solid var(--accent); border-radius: 6px; padding: 3px 6px; font: inherit; font-size: 13px; width: 100%; }
.inline-edit:focus { outline: none; }

/* Guides list */
.guide-list { margin-top: 8px; display: flex; flex-direction: column; gap: 6px; }
.guide-row { display: flex; align-items: center; gap: 6px; }
.guide-row .dot { width: 8px; height: 8px; border-radius: 2px; flex: 0 0 auto; }
.guide-row .dot.h { background: var(--accent); } .guide-row .dot.v { background: var(--station); }
.guide-row input { flex: 1; padding: 5px 7px; border: 1px solid var(--border); border-radius: 7px; font: inherit; }
.guide-row .unit { font-size: 11px; color: var(--muted); }
.guide-row .del { border: none; background: none; color: var(--danger); cursor: pointer; font-size: 15px; padding: 0 4px; }

.right-foot { margin-top: auto; padding: 12px 18px; }

/* ---------------- Print ---------------- */
@media print {
  @page { size: A4 landscape; margin: 8mm; }
  html, body { background: #fff; }
  .left, .right, .sel-info { display: none !important; }
  .app, .stage { display: block; height: auto; overflow: visible; }
  .stage { padding: 0; }
  .canvas { margin: 0 auto; }
  .cv-item .rm { display: none !important; }
}