*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-dark: #0d1117;
  --bg-primary: #161b22;
  --bg-secondary: #1c2128;
  --bg-tertiary: #21262d;
  --bg-hover: #30363d;
  --border: #30363d;
  --text: #c9d1d9;
  --text-dim: #8b949e;
  --text-muted: #6e7681;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --orange: #f0883e;
  --purple: #bc8cff;
}

html, body { height: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif; background: var(--bg-dark); color: var(--text); font-size: 13px; }

#app { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }

/* ── Toolbar ── */
#toolbar {
  display: flex; align-items: center; gap: 16px;
  padding: 0 12px; height: 44px; flex-shrink: 0;
  background: var(--bg-secondary); border-bottom: 1px solid var(--border);
}
.toolbar-title { font-weight: 700; font-size: 15px; color: var(--accent); white-space: nowrap; }
.toolbar-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-group { display: flex; gap: 4px; }
.btn-group + .btn-group { margin-left: 4px; padding-left: 8px; border-left: 1px solid var(--border); }

button {
  padding: 4px 10px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg-tertiary); color: var(--text); font-size: 12px;
  cursor: pointer; white-space: nowrap; transition: background .15s;
}
button:hover { background: var(--bg-hover); border-color: var(--text-muted); }
button.btn-danger { color: var(--danger); }
button.btn-danger:hover { background: #f8514922; border-color: var(--danger); }

/* ── Workspace ── */
#workspace { display: flex; flex: 1; overflow: hidden; }

/* ── Panels ── */
#panel-left, #panel-right {
  flex-shrink: 0; background: var(--bg-primary);
  display: flex; flex-direction: column; overflow: hidden;
}
#panel-left { width: 260px; border-right: 1px solid var(--border); }
#panel-right { width: 300px; border-left: 1px solid var(--border); }

.panel-header {
  padding: 8px 12px; font-weight: 600; font-size: 11px;
  text-transform: uppercase; letter-spacing: .5px;
  color: var(--text-dim); border-bottom: 1px solid var(--border);
  background: var(--bg-secondary); flex-shrink: 0;
}

#tree-view { flex: 1; overflow-y: auto; padding: 4px 0; }

#properties-panel, #results-panel { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
#properties-panel { border-bottom: 1px solid var(--border); }
#props-content, #results-content { flex: 1; overflow-y: auto; padding: 8px 12px; }

.placeholder { color: var(--text-muted); font-style: italic; padding: 12px 0; }

/* ── Viewport ── */
#viewport { flex: 1; position: relative; background: var(--bg-dark); overflow: hidden; }
#viewport canvas { display: block; width: 100%; height: 100%; }

/* ── Tree View ── */
.tree-item {
  display: flex; align-items: center; gap: 6px;
  padding: 3px 10px; cursor: pointer;
  border-left: 2px solid transparent;
  transition: background .1s;
  user-select: none;
}
.tree-item:hover { background: var(--bg-hover); }
.tree-item.selected { background: #58a6ff18; border-left-color: var(--accent); }

.tree-children { padding-left: 14px; margin-left: 6px; border-left: 1px solid var(--border); }

.tree-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 16px; height: 16px; border-radius: 3px; flex-shrink: 0;
  font-size: 10px; font-weight: 700; color: #fff;
}
.tree-icon.collector { background: var(--purple); }
.tree-icon.junction  { background: var(--success); }
.tree-icon.outlet    { background: var(--orange); }
.tree-icon.pipe      { background: var(--text-muted); }
.tree-icon.elbow     { background: var(--accent); }
.tree-icon.reduction { background: var(--warning); }
.tree-icon.gate        { background: var(--success); }
.tree-icon.gate-closed { background: var(--danger); }
.tree-icon.branch-hd { background: var(--bg-hover); color: var(--text-dim); }

.tree-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.branch-header { font-weight: 600; color: var(--text-dim); font-size: 11px; text-transform: uppercase; letter-spacing: .3px; }

/* ── Property Editor ── */
.prop-group { margin-bottom: 8px; }
.prop-group label { display: block; font-size: 11px; color: var(--text-dim); margin-bottom: 3px; }
.prop-group input, .prop-group select {
  width: 100%; padding: 5px 8px; border: 1px solid var(--border);
  border-radius: 4px; background: var(--bg-tertiary); color: var(--text);
  font-size: 13px; outline: none;
}
.prop-group input:focus, .prop-group select:focus { border-color: var(--accent); }
.prop-readonly {
  padding: 5px 8px; border: 1px solid var(--border); border-radius: 4px;
  background: var(--bg-secondary); color: var(--text); font-size: 13px;
}
.prop-separator { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.ducomat-ref { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.ducomat-ref a {
  display: inline-block; padding: 6px 10px; border: 1px solid var(--accent);
  border-radius: 4px; background: var(--bg-tertiary); color: var(--accent);
  font-size: 13px; text-decoration: none;
}
.ducomat-ref a:hover { background: var(--accent); color: #fff; }

.prop-toggle { display: flex; flex-direction: column; }
.toggle-switch {
  display: flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 6px 10px; border-radius: 4px; background: var(--bg-tertiary);
  border: 1px solid var(--border); font-size: 13px; color: var(--text);
}
.toggle-switch:hover { border-color: var(--accent); }
.toggle-switch input[type="checkbox"] {
  width: 16px; height: 16px; accent-color: var(--success); cursor: pointer;
}
.toggle-label { font-weight: 600; }

/* ── Results ── */
.results-section h3 {
  font-size: 11px; text-transform: uppercase; letter-spacing: .4px;
  color: var(--text-dim); margin: 12px 0 6px; padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}
.results-section h3:first-child { margin-top: 0; }

.result-row {
  display: flex; align-items: center; gap: 6px;
  padding: 3px 0; font-size: 13px;
}
.result-row span { flex: 1; color: var(--text-dim); }
.result-row strong { color: var(--text); font-weight: 600; }
.result-row small { color: var(--text-muted); font-size: 11px; }

.result-outlet {
  background: var(--bg-secondary); border-radius: 6px;
  padding: 8px 10px; margin-bottom: 6px;
  border-left: 3px solid var(--orange);
}
.result-outlet-name { font-weight: 600; margin-bottom: 4px; color: var(--orange); }

.result-edge {
  background: var(--bg-secondary); border-radius: 6px;
  padding: 6px 10px; margin-bottom: 4px;
  border-left: 3px solid var(--text-muted);
}

.warning {
  padding: 6px 10px; margin-bottom: 4px; border-radius: 4px;
  background: #d2992218; color: var(--warning); font-size: 12px;
  border-left: 3px solid var(--warning);
}

.velocity-ok { color: var(--success); }
.velocity-low { color: var(--accent); }
.velocity-high { color: var(--danger); }

/* ── Auto button ── */
button.btn-auto { color: var(--purple); font-weight: 600; }
button.btn-auto:hover { background: #bc8cff22; border-color: var(--purple); }
button.btn-primary { background: #238636; border-color: #2ea043; color: #fff; font-weight: 600; }
button.btn-primary:hover { background: #2ea043; }

/* ── Modal ── */
.modal.hidden { display: none; }
.modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.6); }
.modal-content {
  position: relative; width: 640px; max-height: 85vh;
  background: var(--bg-primary); border: 1px solid var(--border);
  border-radius: 10px; display: flex; flex-direction: column;
  box-shadow: 0 16px 48px rgba(0,0,0,.4);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
}
.modal-header h2 { font-size: 16px; font-weight: 700; color: var(--purple); }
.modal-close {
  width: 28px; height: 28px; border: none; background: none;
  color: var(--text-dim); font-size: 20px; cursor: pointer;
  border-radius: 4px; display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--bg-hover); color: var(--text); }
.modal-body { flex: 1; overflow-y: auto; padding: 16px 18px; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 12px 18px; border-top: 1px solid var(--border);
}

fieldset {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; margin-bottom: 14px;
}
fieldset legend {
  font-weight: 600; font-size: 12px; color: var(--accent);
  text-transform: uppercase; letter-spacing: .4px; padding: 0 6px;
}

.auto-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 8px; }
.auto-grid-2 { grid-template-columns: repeat(2, 1fr); }
.auto-grid-3 { grid-template-columns: repeat(3, 1fr); }
.auto-field label { display: block; font-size: 10px; color: var(--text-muted); margin-bottom: 2px; }
.auto-field input {
  width: 100%; padding: 5px 7px; border: 1px solid var(--border);
  border-radius: 4px; background: var(--bg-tertiary); color: var(--text);
  font-size: 12px; outline: none;
}
.auto-field input:focus { border-color: var(--accent); }

.outlet-card {
  background: var(--bg-secondary); border-radius: 6px;
  padding: 10px 12px; margin-bottom: 8px;
  border-left: 3px solid var(--orange); position: relative;
}
.outlet-card-header {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
}
.outlet-card-header input[type="text"] { flex: 1; }
.outlet-card-header input[type="number"] { width: 70px; }
.outlet-card .auto-grid { margin-bottom: 0; }
.outlet-remove {
  position: absolute; top: 6px; right: 6px;
  width: 22px; height: 22px; border: none; background: none;
  color: var(--text-muted); font-size: 16px; cursor: pointer;
  border-radius: 3px; padding: 0;
  display: flex; align-items: center; justify-content: center;
}
.outlet-remove:hover { background: #f8514933; color: var(--danger); }

#auto-add-outlet {
  width: 100%; padding: 6px; border-style: dashed;
  color: var(--text-dim); font-size: 12px;
}
#auto-add-outlet:hover { color: var(--orange); border-color: var(--orange); }

/* ── Auto-dimensionnement : options ── */
#auto-options.hidden, #auto-form.hidden, #auto-back.hidden { display: none; }
.auto-options-intro { font-size: 12px; color: var(--text-dim); margin-bottom: 12px; }
#auto-options-list { display: flex; flex-direction: column; gap: 10px; }
.auto-option {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: 8px; padding: 12px 14px;
}
.auto-option.retained { border-color: #2ea043; box-shadow: 0 0 0 1px #2ea04344 inset; }
.auto-option-thumb {
  display: block; width: 100%; height: 170px; object-fit: contain;
  background: #0d1017; border: 1px solid var(--border); border-radius: 6px; margin-bottom: 10px;
}
.auto-thumb-na {
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 12px;
}
.auto-option-head { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.auto-option-title { font-weight: 600; font-size: 13px; color: var(--text); }
.auto-option-badge {
  font-size: 10px; text-transform: uppercase; letter-spacing: .4px;
  background: #2ea043; color: #fff; padding: 2px 7px; border-radius: 10px;
}
.auto-option-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px 12px; margin-bottom: 12px;
}
.auto-option-metrics div { display: flex; flex-direction: column; }
.auto-option-metrics span { font-size: 10px; color: var(--text-muted); }
.auto-option-metrics strong { font-size: 14px; color: var(--text); }
.auto-option-metrics .vel-ok   { color: #3fb950; }
.auto-option-metrics .vel-warn { color: #d29922; }
.auto-option-metrics .vel-bad  { color: var(--danger); }
.auto-option > button.btn-primary { width: 100%; padding: 7px; }

/* JSON import/export toolbar */
.auto-io { display: flex; gap: 8px; margin-bottom: 14px; }
.auto-io button {
  flex: 1; padding: 7px 8px; border: 1px dashed var(--border);
  border-radius: 6px; background: var(--bg-tertiary); color: var(--text-dim); font-size: 12px;
}
.auto-io button:hover { border-color: var(--accent); color: var(--accent); }

/* ── Nomenclature (BOM) ── */
.bom-summary { font-size: 13px; color: var(--text-dim); margin-bottom: 12px; }
.bom-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.bom-table th {
  text-align: left; color: var(--text-muted); font-size: 10px;
  text-transform: uppercase; letter-spacing: .4px; padding: 5px 8px; border-bottom: 1px solid var(--border);
}
.bom-table td { padding: 6px 8px; border-bottom: 1px solid var(--border); color: var(--text); }
.bom-table tbody tr:hover { background: var(--bg-secondary); }
.bom-table .bom-qty { text-align: right; white-space: nowrap; font-weight: 600; }
.bom-table .bom-ref { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 11px; color: var(--text-dim); white-space: nowrap; }
.bom-table a { color: var(--accent); text-decoration: none; }
.bom-detail { color: var(--text-muted); font-size: 11px; }
.bom-note { color: var(--accent); font-size: 11px; }
.bom-summary strong { color: var(--text); }
.bom-foot { margin-top: 12px; font-size: 11px; color: var(--text-muted); line-height: 1.5; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }