:root {
  --bg: #f4f5f7; --panel: #ffffff; --line: #d9dde3; --text: #1f2933; --muted: #6b7280;
  --accent: #1d4ed8; --accent-2: #0f766e; --danger: #b91c1c; --warn: #b45309;
  --axe-droite: #1d4ed8; --axe-clotho: #15803d; --axe-arc: #b91c1c; --tn: #6b7280; --rasante: #dc2626;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; --mono: ui-monospace, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; font: 13px/1.4 var(--font); color: var(--text); background: var(--bg); }
button { font: inherit; padding: 4px 9px; border: 1px solid var(--line); background: #fff; border-radius: 4px; cursor: pointer; }
button:hover { background: #eef2ff; }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.primary:hover { background: #1e40af; }
button.toggle.active { background: var(--accent-2); color: #fff; border-color: var(--accent-2); }
input, select { font: inherit; padding: 3px 5px; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
input[type=number] { width: 90px; text-align: right; }
h3 { margin: 6px 0 8px; font-size: 14px; } h4 { margin: 10px 0 4px; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.muted { color: var(--muted); } .hint { color: var(--muted); font-size: 12px; margin: 6px 0; }

#topbar { display: flex; align-items: center; gap: 10px; padding: 6px 10px; background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 6px; }
.logo { display: inline-grid; place-items: center; width: 26px; height: 26px; background: var(--accent); color: #fff; font-weight: 700; border-radius: 6px; }
.title { font-weight: 700; font-size: 16px; } .sub { color: var(--muted); font-size: 12px; }
.projname { width: 220px; font-weight: 600; }
.field { display: flex; align-items: center; gap: 4px; color: var(--muted); }
.actions { margin-left: auto; display: flex; gap: 6px; align-items: center; }
.menu { position: relative; }
.menu-items { display: none; position: absolute; right: 0; top: 100%; z-index: 20; background: #fff; border: 1px solid var(--line); border-radius: 6px; box-shadow: 0 6px 20px rgba(0,0,0,.12); min-width: 240px; padding: 4px; }
.menu:hover .menu-items, .menu:focus-within .menu-items { display: block; }
.menu-items button { display: block; width: 100%; text-align: left; border: 0; }

#layout { display: flex; height: calc(100% - 45px); }
#sidebar { width: 340px; background: var(--panel); border-right: 1px solid var(--line); display: flex; flex-direction: column; overflow: hidden; }
.side-tabs, .main-tabs { display: flex; border-bottom: 1px solid var(--line); }
.side-tabs button, .main-tabs button { flex: 1; border: 0; border-radius: 0; background: transparent; padding: 7px 4px; color: var(--muted); border-bottom: 2px solid transparent; }
.side-tabs button.active, .main-tabs button.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.side-panel { display: none; padding: 10px; overflow: auto; flex: 1; }
.side-panel.active { display: block; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 6px; margin: 4px 0; }
.row label { color: var(--muted); }
.row input:not([type=number]):not([type=checkbox]) { flex: 1; }
.checks label, .inline { display: block; margin: 2px 0; }
.toolbar { display: flex; gap: 6px; margin: 6px 0; flex-wrap: wrap; }
.layer-list { max-height: 180px; overflow: auto; border: 1px solid var(--line); border-radius: 4px; padding: 4px; font-family: var(--mono); font-size: 11px; }
.layer-list label { display: flex; gap: 6px; align-items: center; }
.layer-list .sw { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }
.layer-list .n { margin-left: auto; color: var(--muted); }

table.grid { width: 100%; border-collapse: collapse; font-size: 12px; margin: 6px 0; }
table.grid th, table.grid td { border: 1px solid var(--line); padding: 2px 4px; text-align: right; white-space: nowrap; }
table.grid th { background: #f1f5f9; font-weight: 600; text-align: center; position: sticky; top: 0; }
table.grid td:first-child, table.grid th:first-child { text-align: center; }
table.grid input { width: 72px; text-align: right; padding: 1px 3px; border-color: transparent; background: transparent; }
table.grid input:focus { border-color: var(--accent); background: #fff; }
table.grid td.del button { padding: 0 6px; border: 0; color: var(--danger); background: transparent; }
table.grid tr.sel td { background: #fef3c7; }
table.wide { font-family: var(--mono); font-size: 11px; }
.errors div { color: var(--danger); font-size: 12px; margin: 2px 0; }
.controls div { font-size: 12px; margin: 2px 0; } .controls .erreur { color: var(--danger); } .controls .avert { color: var(--warn); }
.elements { font-family: var(--mono); font-size: 11px; margin-top: 8px; }
.elements div { padding: 1px 0; border-bottom: 1px dotted var(--line); }
.elements .droite { color: var(--axe-droite); } .elements .clothoide { color: var(--axe-clotho); } .elements .arc { color: var(--axe-arc); }

#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.view { display: none; flex: 1; min-height: 0; position: relative; }
.view.active { display: flex; flex-direction: column; }
.view.scroll { overflow: auto; padding: 10px; }
.canvas-wrap { position: relative; flex: 1; min-height: 0; background: #fff; }
canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.overlay { position: absolute; background: rgba(255,255,255,.9); border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; font-size: 12px; display: flex; gap: 10px; align-items: center; }
.top-left { top: 8px; left: 8px; } .bottom-left { bottom: 8px; left: 8px; font-family: var(--mono); }
.pt-bar { display: flex; gap: 12px; align-items: center; padding: 6px 10px; border-bottom: 1px solid var(--line); background: var(--panel); }
.summary { display: flex; gap: 20px; margin-bottom: 8px; font-size: 14px; }
.summary b { font-family: var(--mono); }
#status { position: fixed; bottom: 8px; right: 12px; background: #111827; color: #fff; padding: 6px 12px; border-radius: 6px; font-size: 12px; opacity: 0; transition: opacity .2s; pointer-events: none; max-width: 60vw; }
#status.show { opacity: .95; }
dialog { border: 1px solid var(--line); border-radius: 8px; max-width: 560px; padding: 16px 20px; }
dialog::backdrop { background: rgba(0,0,0,.3); }
@media (max-width: 900px) { #layout { flex-direction: column; } #sidebar { width: 100%; max-height: 45%; } }