:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --warning: #f59e0b;
    --success: #16a34a;
    --bg: #f1f5f9;
    --surface: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #cbd5e1;
    --class-fill: #ffffff;
    --class-stroke: #2563eb;
    --class-header: #dbeafe;
    --interface-stroke: #059669;
    --interface-header: #d1fae5;
    --enum-stroke: #7c3aed;
    --enum-header: #ede9fe;
    --abstract-header: #e0e7ff;
    --link-color: #475569;
    --shadow: 0 1px 3px rgba(0,0,0,0.12);
    --radius: 6px;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --mono: 'Consolas', 'Cascadia Code', 'Courier New', monospace;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

[hidden] { display: none !important; }

/* === Toolbar === */
#toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    z-index: 100;
    flex-wrap: wrap;
}

.toolbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-right: 12px;
}
.brand-name {
    font-size: 19px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.3px;
}
.brand-name span { color: var(--primary); }
.project-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
}

.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    flex: 1;
}

.toolbar-separator {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 6px;
}

.toolbar-dropdown { position: relative; }
.toolbar-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 4px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
    z-index: 150;
    min-width: 210px;
    padding: 4px 0;
}
.toolbar-dropdown-menu.open { display: block; }
.toolbar-dropdown-menu button {
    display: flex;
    width: 100%;
    text-align: left;
    border: none;
    border-radius: 0;
    padding: 7px 14px;
    font-size: 13px;
}
.toolbar-dropdown-menu button:hover { background: var(--bg); }
.rel-icon {
    display: inline-block;
    width: 34px;
    font-family: var(--mono);
    color: var(--text-muted);
}

button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    font-size: 13px;
    font-family: var(--font);
    cursor: pointer;
    transition: all 0.15s;
}
button:hover:not(:disabled) {
    background: var(--bg);
    border-color: var(--primary);
    color: var(--primary);
}
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
button.btn-primary:hover:not(:disabled) { background: var(--primary-hover); color: white; }
button.btn-secondary { background: var(--bg); }
button.btn-danger { color: var(--danger); border-color: var(--danger); }
button.btn-danger:hover:not(:disabled) { background: var(--danger); color: white; }
button.btn-small { padding: 3px 8px; font-size: 12px; }
.btn-icon { padding: 6px; justify-content: center; }
.btn-icon svg { display: block; }
.btn-caret { font-size: 10px; line-height: 1; }

.btn-help {
    width: 28px;
    height: 28px;
    padding: 0;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
    justify-content: center;
    color: var(--primary);
    border-color: var(--primary);
}
.btn-help:hover:not(:disabled) { background: var(--primary); color: white; }

/* === Workspace === */
#workspace {
    flex: 1;
    position: relative;
    overflow: hidden;
}
#canvas-scroll {
    position: absolute;
    inset: 0;
    overflow: auto;
    background-color: var(--bg);
    background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
    background-size: 20px 20px;
}

#uml-canvas {
    display: block;
    min-width: 100%;
    min-height: 100%;
    user-select: none;
}

/* === Classes === */
#uml-canvas .class-group { cursor: move; }
#uml-canvas .class-rect {
    fill: var(--class-fill);
    stroke: var(--class-stroke);
    stroke-width: 1.5;
    filter: drop-shadow(0 1px 2px rgba(15,23,42,0.12));
}
#uml-canvas .class-header-rect { fill: var(--class-header); }
#uml-canvas .class-kind-abstract .class-header-rect { fill: var(--abstract-header); }
#uml-canvas .class-kind-interface .class-rect { stroke: var(--interface-stroke); }
#uml-canvas .class-kind-interface .class-header-rect { fill: var(--interface-header); }
#uml-canvas .class-kind-interface .class-separator { stroke: var(--interface-stroke); }
#uml-canvas .class-kind-enum .class-rect { stroke: var(--enum-stroke); }
#uml-canvas .class-kind-enum .class-header-rect { fill: var(--enum-header); }
#uml-canvas .class-kind-enum .class-separator { stroke: var(--enum-stroke); }

#uml-canvas .class-separator { stroke: var(--class-stroke); stroke-width: 1; }
#uml-canvas .class-name {
    fill: var(--text);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .class-name-abstract { font-style: italic; }
#uml-canvas .class-constraint {
    fill: var(--text-muted);
    font-size: 11px;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .class-stereotype {
    fill: var(--text-muted);
    font-size: 11px;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .class-member {
    fill: var(--text);
    font-size: 12px;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .class-member-static { text-decoration: underline; }
#uml-canvas .class-member-abstract { font-style: italic; }

#uml-canvas .selected .class-rect {
    stroke: var(--primary);
    stroke-width: 3;
    stroke-dasharray: 5 3;
}
#uml-canvas .connect-source .class-rect {
    stroke: var(--warning);
    stroke-width: 3;
}

#uml-canvas .drag-handle { cursor: grab; touch-action: none; }
@media (hover: hover) {
    #uml-canvas .drag-handle { display: none; }
}
#uml-canvas .drag-handle circle { fill: #64748b; }

#uml-canvas .edit-btn { cursor: pointer; }
#uml-canvas .edit-btn-bg { fill: var(--primary); stroke: #fff; stroke-width: 1.5; }
#uml-canvas .edit-btn:hover .edit-btn-bg { fill: var(--primary-hover); }
#uml-canvas .edit-btn-icon {
    fill: #fff;
    font-size: 13px;
    font-weight: 700;
    pointer-events: none;
}

/* === Relations === */
#uml-canvas .relation-group { cursor: pointer; }
#uml-canvas .relation-hit {
    stroke: transparent;
    stroke-width: 12;
    fill: none;
}
#uml-canvas .relation-line {
    stroke: var(--link-color);
    stroke-width: 1.5;
    fill: none;
    pointer-events: none;
}
#uml-canvas .relation-dashed { stroke-dasharray: 6 4; }
#uml-canvas .relation-assoc-class-line {
    stroke: var(--link-color);
    stroke-width: 1.5;
    stroke-dasharray: 5 4;
    fill: none;
    pointer-events: none;
}
#uml-canvas .selected .relation-assoc-class-line { stroke: var(--primary); stroke-width: 2; }
#uml-canvas .relation-triangle,
#uml-canvas .relation-diamond {
    fill: #ffffff;
    stroke: var(--link-color);
    stroke-width: 1.5;
}
#uml-canvas .relation-diamond-filled {
    fill: var(--link-color);
    stroke: var(--link-color);
    stroke-width: 1.5;
}
#uml-canvas .relation-arrow {
    fill: none;
    stroke: var(--link-color);
    stroke-width: 1.5;
}
#uml-canvas .relation-cross {
    fill: none;
    stroke: var(--link-color);
    stroke-width: 1.5;
}
#uml-canvas .relation-mult,
#uml-canvas .relation-role {
    fill: var(--text);
    font-size: 11.5px;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .relation-mult { font-weight: 600; }
#uml-canvas .qualifier-box { fill: var(--class-fill); stroke: var(--class-stroke); stroke-width: 1.2; }
#uml-canvas .qualifier-text {
    fill: var(--text);
    font-size: 11px;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .selected .qualifier-box { stroke: var(--primary); stroke-width: 2; }
#uml-canvas .nary-group { cursor: move; }
#uml-canvas .nary-diamond { fill: #ffffff; stroke: var(--link-color); stroke-width: 1.5; }
#uml-canvas .nary-name {
    fill: var(--text);
    font-size: 12px;
    font-weight: 600;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .selected .nary-diamond { stroke: var(--primary); stroke-width: 2.5; }
#uml-canvas .selected .nary-name { fill: var(--primary); }
#uml-canvas .link-constraint-group { cursor: pointer; }
#uml-canvas .link-constraint-line {
    stroke: var(--text-muted);
    stroke-width: 1.2;
    stroke-dasharray: 4 3;
    fill: none;
    pointer-events: none;
}
#uml-canvas .link-constraint-label {
    fill: var(--text);
    font-size: 11px;
    font-weight: 600;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .selected .link-constraint-line { stroke: var(--primary); stroke-width: 2; }
#uml-canvas .selected .link-constraint-label { fill: var(--primary); }
#uml-canvas .relation-constraint {
    fill: var(--text-muted);
    font-size: 11px;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .relation-role { font-style: italic; fill: var(--text-muted); }
#uml-canvas .relation-mods {
    fill: var(--text-muted);
    font-size: 11px;
    font-family: var(--font);
    pointer-events: none;
}
/* === Diagramme d'activite === */
#ac-scroll {
    position: absolute;
    inset: 0;
    overflow: auto;
    background-color: var(--bg);
    background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
    background-size: 20px 20px;
}
#ac-canvas { display: block; min-width: 100%; min-height: 100%; user-select: none; }
#ac-canvas .ac-node-group { cursor: move; }
#ac-canvas .ac-flow-group { cursor: pointer; }
#ac-canvas .ac-action { fill: #eff6ff; stroke: #2563eb; stroke-width: 1.5; }
#ac-canvas .ac-action-name { font-family: var(--font); font-size: 12.5px; font-weight: 600; fill: var(--text); pointer-events: none; }
#ac-canvas .ac-initial { fill: #1e293b; stroke: #1e293b; }
#ac-canvas .ac-final-ring { fill: #ffffff; stroke: #1e293b; stroke-width: 2; }
#ac-canvas .ac-final-dot { fill: #1e293b; stroke: none; }
#ac-canvas .ac-flow-final-cross { stroke: #1e293b; stroke-width: 2.2; fill: none; }
/* Noeud d'objet : rectangle a angles vifs, la donnee qui circule */
#ac-canvas .ac-object { fill: #ffffff; stroke: var(--text); stroke-width: 1.6; }
#ac-canvas .ac-object-state {
    font-family: var(--font);
    font-size: 11.5px;
    fill: var(--text-muted);
    pointer-events: none;
}
#ac-canvas .selected .ac-object { stroke: var(--primary); stroke-width: 3; }
#ac-canvas .connect-source .ac-object { stroke: var(--warning); stroke-width: 3; }

/* Noeuds d'evenement : drapeaux de signal et sablier */
#ac-canvas .ac-signal { fill: #fef3c7; stroke: #b45309; stroke-width: 1.6; }
#ac-canvas .ac-time-event { fill: #ffffff; stroke: var(--text); stroke-width: 1.8; }
#ac-canvas .selected .ac-signal,
#ac-canvas .selected .ac-time-event { stroke: var(--primary); stroke-width: 3; }
#ac-canvas .connect-source .ac-signal,
#ac-canvas .connect-source .ac-time-event { stroke: var(--warning); stroke-width: 3; }
#ac-canvas .ac-diamond { fill: #fffbeb; stroke: #b45309; stroke-width: 1.5; }
#ac-canvas .ac-bar { fill: #1e293b; stroke: #1e293b; }
/* Couloirs : des bandes nommees, sous tout le reste du diagramme */
#ac-canvas .ac-lane-body { fill: rgba(148,163,184,0.06); stroke: #94a3b8; stroke-width: 1.2; }
#ac-canvas .ac-lane-head { fill: #e2e8f0; stroke: #94a3b8; stroke-width: 1.2; cursor: pointer; }
#ac-canvas .ac-lane-group:hover .ac-lane-head { fill: #cbd5e1; }
#ac-canvas .ac-lane-name {
    font-family: var(--font);
    font-size: 12.5px;
    font-weight: 600;
    fill: var(--text);
    pointer-events: none;
}
#ac-canvas .selected .ac-lane-head { stroke: var(--primary); stroke-width: 2.5; }
#ac-canvas .selected .ac-lane-body { stroke: var(--primary); }
#ac-canvas .ac-lane-sep { fill: transparent; }
#ac-canvas .ac-lane-sep-v { cursor: col-resize; }
#ac-canvas .ac-lane-sep-h { cursor: row-resize; }

#ac-canvas .ac-hit { stroke: transparent; stroke-width: 14; fill: none; }
#ac-canvas .ac-flow-line { stroke: var(--link-color); stroke-width: 1.5; fill: none; pointer-events: none; }
#ac-canvas .ac-arrow { fill: none; stroke: var(--link-color); stroke-width: 1.5; }
#ac-canvas .ac-label-bg { fill: #ffffff; fill-opacity: 0.92; }
#ac-canvas .ac-flow-label-group { cursor: pointer; }
#ac-canvas .ac-flow-label { font-family: var(--font); font-size: 11px; fill: var(--text); pointer-events: none; }
#ac-canvas .ac-flow-group:hover .ac-flow-line { stroke: var(--primary); }
#ac-canvas .selected .ac-flow-line,
#ac-canvas .selected .ac-arrow { stroke: var(--primary); stroke-width: 2.5; }
#ac-canvas .selected .ac-action,
#ac-canvas .selected .ac-diamond,
#ac-canvas .selected .ac-final-ring { stroke: var(--primary); stroke-width: 2.5; }
#ac-canvas .selected .ac-initial,
#ac-canvas .selected .ac-bar { fill: var(--primary); stroke: var(--primary); }
#ac-canvas .connect-source .ac-action,
#ac-canvas .connect-source .ac-diamond,
#ac-canvas .connect-source .ac-final-ring { stroke: var(--warning); stroke-width: 3; }
#ac-canvas .drag-handle { cursor: grab; touch-action: none; }
#ac-canvas .drag-handle circle { fill: #64748b; }
#ac-canvas .edit-btn,
#ac-canvas .ac-rotate-btn { cursor: pointer; }
#ac-canvas .ac-rotate-btn:hover .edit-btn-bg { fill: var(--primary-hover); }
#ac-canvas .edit-btn-bg { fill: var(--primary); stroke: #fff; stroke-width: 1.5; }
#ac-canvas .edit-btn-icon { fill: #fff; font-size: 13px; font-weight: 700; pointer-events: none; }
#ac-canvas .note-group { cursor: move; }
#ac-canvas .note-rect { fill: #fffbeb; stroke: #b45309; stroke-width: 1.2; }
#ac-canvas .note-fold { fill: none; stroke: #b45309; stroke-width: 1.2; }
#ac-canvas .note-text { font-family: var(--font); font-size: 11.5px; fill: var(--text); pointer-events: none; }
#ac-canvas .note-anchor-line { stroke: #b45309; stroke-width: 1.2; stroke-dasharray: 5 4; fill: none; pointer-events: none; }
#ac-canvas .selected .note-rect { stroke: var(--primary); stroke-width: 2.5; }

/* === Diagramme de sequence === */
#sq-scroll {
    position: absolute;
    inset: 0;
    overflow: auto;
    background-color: var(--canvas-bg, #f8fafc);
    background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
    background-size: 20px 20px;
}
#sq-canvas { display: block; min-width: 100%; min-height: 100%; user-select: none; }
/* Cadre de l'interaction : « sd » suivi de son nom, cliquable pour renommer */
#sq-canvas .sq-frame-group { cursor: pointer; }
#sq-canvas .sq-frame-rect { fill: none; stroke: #94a3b8; stroke-width: 1.3; }
#sq-canvas .sq-frame-tag { fill: #f1f5f9; stroke: #94a3b8; stroke-width: 1.3; }
#sq-canvas .sq-frame-group:hover .sq-frame-tag { fill: #e2e8f0; }
#sq-canvas .sq-frame-label {
    font-family: var(--font);
    font-size: 12px;
    font-weight: 600;
    fill: var(--text);
    pointer-events: none;
}
#sq-canvas .sq-lifeline-group { cursor: pointer; }
/* Un message se reordonne en le glissant vers le haut ou vers le bas */
#sq-canvas .sq-message-group { cursor: grab; }
#sq-canvas .sq-head-box { fill: #eff6ff; stroke: #2563eb; stroke-width: 1.5; }
#sq-canvas .sq-head-name { font-family: var(--font); font-size: 12.5px; font-weight: 600; fill: var(--text); pointer-events: none; }
#sq-canvas .sq-lifeline { stroke: #64748b; stroke-width: 1.2; stroke-dasharray: 6 5; }
#sq-canvas .sq-actor-figure { fill: #ffffff; stroke: var(--text); stroke-width: 2; }
#sq-canvas path.sq-actor-figure { fill: none; }
#sq-canvas .sq-activation { fill: #dbeafe; stroke: #2563eb; stroke-width: 1.2; }
#sq-canvas .sq-destroy { stroke: #b91c1c; stroke-width: 2.5; fill: none; }
#sq-canvas .sq-fragment-group { cursor: pointer; }
#sq-canvas .sq-fragment-rect { fill: rgba(37,99,235,0.04); stroke: #475569; stroke-width: 1.3; }
#sq-canvas .sq-fragment-tag { fill: #e2e8f0; stroke: #475569; stroke-width: 1.3; }
#sq-canvas .sq-fragment-label { font-family: var(--font); font-size: 11.5px; font-weight: 600; fill: var(--text); pointer-events: none; }
#sq-canvas .sq-operand-sep { stroke: #475569; stroke-width: 1.2; stroke-dasharray: 6 4; }
#sq-canvas .sq-guard { font-family: var(--font); font-size: 11px; fill: var(--text); pointer-events: none; }
#sq-canvas .selected .sq-fragment-rect { stroke: var(--primary); stroke-width: 2.5; }
#sq-canvas .selected .sq-fragment-tag { stroke: var(--primary); }
/* Reference vers une autre interaction : cadre opaque, les lignes de vie y entrent */
#sq-canvas .sq-ref-group { cursor: grab; }
#sq-canvas .sq-ref-rect { fill: #ffffff; stroke: #475569; stroke-width: 1.3; }
#sq-canvas .sq-ref-tag { fill: #e2e8f0; stroke: #475569; stroke-width: 1.3; }
#sq-canvas .sq-ref-name {
    font-family: var(--font);
    font-size: 12.5px;
    font-weight: 600;
    fill: var(--text);
    pointer-events: none;
}
#sq-canvas .sq-ref-group:hover .sq-ref-rect { stroke: var(--primary); }
#sq-canvas .selected .sq-ref-rect { stroke: var(--primary); stroke-width: 2.5; }
#sq-canvas .selected .sq-ref-tag { stroke: var(--primary); }

#sq-canvas .sq-hit { stroke: transparent; stroke-width: 14; fill: none; }
#sq-canvas .sq-message-line { stroke: var(--link-color); stroke-width: 1.5; fill: none; pointer-events: none; }
#sq-canvas .sq-dashed { stroke-dasharray: 6 4; }
#sq-canvas .sq-arrow-filled { fill: var(--link-color); stroke: var(--link-color); stroke-width: 1.5; }
#sq-canvas .sq-arrow-open { fill: none; stroke: var(--link-color); stroke-width: 1.5; }
#sq-canvas .sq-label-bg { fill: #ffffff; fill-opacity: 0.92; }
#sq-canvas .sq-message-name { font-family: var(--font); font-size: 11.5px; fill: var(--text); pointer-events: none; }
#sq-canvas .sq-message-group:hover .sq-message-line { stroke: var(--primary); }
#sq-canvas .selected .sq-message-line,
#sq-canvas .selected .sq-arrow-open { stroke: var(--primary); stroke-width: 2.5; }
#sq-canvas .selected .sq-arrow-filled { fill: var(--primary); stroke: var(--primary); }
#sq-canvas .selected .sq-head-box { stroke: var(--primary); stroke-width: 2.5; }
#sq-canvas .selected .sq-actor-figure { stroke: var(--primary); }

/* En-tete : la prise qui reordonne les lignes de vie de gauche a droite */
#sq-canvas .sq-head { cursor: grab; }
#sq-canvas .sq-head-grab { fill: transparent; }
#sq-canvas .sq-head:hover .sq-head-box { fill: #dbeafe; }
#sq-canvas.sq-reordering,
#sq-canvas.sq-reordering .sq-head,
#sq-canvas.sq-reordering .sq-message-group,
#sq-canvas.sq-reordering .sq-ref-group { cursor: grabbing; }
#sq-canvas.sq-reordering .sq-lifeline-group.selected .sq-head-box { fill: #bfdbfe; }
#sq-canvas .drag-handle { cursor: grab; touch-action: none; }
#sq-canvas .drag-handle circle { fill: #b45309; }
#sq-canvas .edit-btn { cursor: pointer; }
#sq-canvas .edit-btn-bg { fill: var(--primary); stroke: #fff; stroke-width: 1.5; }
#sq-canvas .edit-btn:hover .edit-btn-bg { fill: var(--primary-hover); }
#sq-canvas .edit-btn-icon { fill: #fff; font-size: 13px; font-weight: 700; pointer-events: none; }
#sq-canvas .note-group { cursor: move; }
#sq-canvas .note-rect { fill: #fffbeb; stroke: #b45309; stroke-width: 1.2; }
#sq-canvas .note-fold { fill: none; stroke: #b45309; stroke-width: 1.2; }
#sq-canvas .note-text { font-family: var(--font); font-size: 11.5px; fill: var(--text); pointer-events: none; }
#sq-canvas .note-anchor-line { stroke: #b45309; stroke-width: 1.2; stroke-dasharray: 5 4; fill: none; pointer-events: none; }
#sq-canvas .selected .note-rect { stroke: var(--primary); stroke-width: 2.5; }

/* === Notes (UML Comment) === */
#uml-canvas .note-group,
#uc-canvas .note-group { cursor: move; }
#uml-canvas .note-rect,
#uc-canvas .note-rect { fill: #fffbeb; stroke: #b45309; stroke-width: 1.2; }
#uml-canvas .note-fold,
#uc-canvas .note-fold { fill: none; stroke: #b45309; stroke-width: 1.2; }
#uml-canvas .note-text,
#uc-canvas .note-text { font-family: var(--font); font-size: 11.5px; fill: var(--text); pointer-events: none; }
#uml-canvas .note-anchor-line,
#uc-canvas .note-anchor-line { stroke: #b45309; stroke-width: 1.2; stroke-dasharray: 5 4; fill: none; pointer-events: none; }
#uml-canvas .selected .note-rect,
#uc-canvas .selected .note-rect { stroke: var(--primary); stroke-width: 2.5; }
#uml-canvas .selected .note-fold,
#uc-canvas .selected .note-fold { stroke: var(--primary); }
#uml-canvas .note-group .drag-handle circle,
#uc-canvas .note-group .drag-handle circle { fill: #b45309; }
.note-anchor-list .member-item { gap: 8px; }
.note-anchor-list .checkbox-group { flex: 1; min-width: 0; }

#uml-canvas .relation-label-bg { fill: #ffffff; fill-opacity: 0.9; }
#uml-canvas .relation-label {
    fill: var(--text);
    font-size: 11px;
    font-family: var(--font);
    pointer-events: none;
}
#uml-canvas .relation-group:hover .relation-line { stroke: var(--primary); }
#uml-canvas .selected .relation-line,
#uml-canvas .selected .relation-cross,
#uml-canvas .selected .relation-arrow { stroke: var(--primary); stroke-width: 2.5; }
#uml-canvas .selected .relation-triangle,
#uml-canvas .selected .relation-diamond { stroke: var(--primary); stroke-width: 2.5; }
#uml-canvas .selected .relation-diamond-filled { fill: var(--primary); stroke: var(--primary); }

.connection-mode #uml-canvas,
.connection-mode #uml-canvas .class-group { cursor: crosshair; }

.mode-indicator {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--warning);
    color: var(--text);
    padding: 6px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    z-index: 60;
    box-shadow: var(--shadow);
    white-space: nowrap;
}

.empty-state {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-muted);
    pointer-events: none;
}
.empty-state h2 { font-size: 20px; margin-bottom: 8px; color: var(--text); }
.empty-state p { font-size: 14px; margin-bottom: 4px; }
.empty-state button { pointer-events: auto; margin-top: 12px; }

/* === Footer === */
#app-footer {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding: 6px 16px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 12px;
}
#app-footer a { color: var(--text-muted); text-decoration: none; }
#app-footer a:hover { color: var(--primary); text-decoration: underline; }

/* === Panel === */
.panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 370px;
    height: 100%;
    background: var(--surface);
    border-left: 1px solid var(--border);
    box-shadow: -2px 0 8px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    z-index: 50;
    transition: transform 0.2s ease;
}
.panel.hidden { transform: translateX(100%); pointer-events: none; }
.panel-backdrop { display: none; }
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}
.panel-header h3 { font-size: 15px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#panel-close, #modal-close {
    border: none;
    background: none;
    font-size: 20px;
    padding: 2px 6px;
    color: var(--text-muted);
}
#panel-body { flex: 1; overflow-y: auto; padding: 16px; }
#panel-body::-webkit-scrollbar { width: 6px; }
#panel-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.panel-section { margin-bottom: 22px; }
.panel-section h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.form-group { margin-bottom: 10px; }
.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.form-group input,
.form-group select,
.form-group textarea,
.full-select {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    font-family: var(--font);
    color: var(--text);
    background: var(--surface);
}
.form-group textarea { resize: vertical; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37,99,235,0.15);
}
.form-row { display: flex; gap: 8px; align-items: flex-end; }
.form-row .form-group { flex: 1; min-width: 0; }
.vis-select { font-family: var(--mono) !important; }

.checkbox-row { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 6px; }
.uc-mult-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.uc-mult-row .form-group { margin-bottom: 0; }
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    cursor: pointer;
}
.checkbox-group input { width: auto; }
.checkbox-group label { margin: 0; cursor: pointer; }
.hint { font-size: 11px; color: var(--text-muted); font-style: italic; }
.empty-hint { color: #94a3b8; font-size: 12px; margin-bottom: 8px; }

.member-list { list-style: none; }
.member-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 4px;
    font-size: 12.5px;
    background: var(--bg);
    cursor: pointer;
}
.member-item:hover { background: rgba(37,99,235,0.08); }
.member-item.active { background: rgba(37,99,235,0.15); border-left: 3px solid var(--primary); }
.member-vis { font-family: var(--mono); font-weight: 700; color: var(--primary); width: 10px; }
.member-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--mono); font-size: 12px; }
.member-text.is-static { text-decoration: underline; }
.member-text.is-abstract { font-style: italic; }
.member-type { color: var(--text-muted); }
.member-actions { display: flex; gap: 2px; }
.member-actions button {
    border: none;
    background: none;
    color: var(--text-muted);
    padding: 0 4px;
    font-size: 14px;
}
.member-actions .btn-del:hover:not(:disabled) { color: var(--danger); background: none; }
.member-actions .btn-move:hover:not(:disabled) { background: none; }
.member-list .member-item:first-child .btn-move { visibility: hidden; }

.member-form {
    margin-top: 8px;
    padding: 10px;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
}
.form-buttons { display: flex; gap: 8px; }

.badge {
    font-size: 9.5px;
    font-weight: 700;
    padding: 1px 5px;
    border-radius: 3px;
    background: #e2e8f0;
    color: var(--text-muted);
    white-space: nowrap;
}
.badge-const { background: #fef3c7; color: #92400e; }
.badge-rel { background: #dbeafe; color: var(--primary); }
.badge-assoc-class { background: #fef3c7; color: #92400e; }
.assoc-class-row { display: flex; gap: 6px; margin-bottom: 8px; }
.rule-hint { color: #b45309; font-size: 12px; margin-bottom: 8px; }
.assoc-class-row .rel-goto { flex: 1; justify-content: center; font-weight: 600; }

.rel-help {
    font-size: 12px;
    color: #0369a1;
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    border-radius: var(--radius);
    padding: 8px 10px;
    margin-bottom: 10px;
}
.rel-ends-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    margin-bottom: 10px;
}
.rel-ends-summary .rel-goto { flex: 1; justify-content: center; font-weight: 600; }
.rel-end {
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 8px;
    background: var(--bg);
}
.rel-end-title { font-size: 12px; font-weight: 600; margin-bottom: 6px; }

/* === Toast === */
#toast-container {
    position: fixed;
    top: 60px;
    right: 16px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    padding: 10px 16px;
    border-radius: var(--radius);
    color: white;
    font-size: 13px;
    max-width: 420px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    animation: toast-in 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}
.toast-icon { font-size: 16px; flex-shrink: 0; }
.toast.toast-error { background: var(--danger); }
.toast.toast-warning { background: var(--warning); color: var(--text); }
.toast.toast-success { background: var(--success); }
.toast.toast-info { background: var(--primary); }
@keyframes toast-in {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

/* === Modal === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 400;
}
.modal-overlay.hidden { display: none; }
.modal {
    background: var(--surface);
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
    width: 440px;
    max-width: 92vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}
.modal.modal-wide { width: 720px; }
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 16px; }
#modal-body { padding: 20px; overflow-y: auto; }
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 20px;
    border-top: 1px solid var(--border);
}
.kind-choice { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.kind-choice label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 4px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 11.5px;
    cursor: pointer;
    text-align: center;
}
.kind-choice input { display: none; }
.kind-choice label:has(input:checked) { border-color: var(--primary); background: #eff6ff; color: var(--primary); font-weight: 600; }

/* === Code overlay === */
.code-overlay,
.help-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg);
    z-index: 300;
    display: flex;
    flex-direction: column;
}
.code-overlay.hidden,
.help-overlay.hidden { display: none; }
.code-toolbar,
.help-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    gap: 12px;
    flex-wrap: wrap;
}
.code-title,
.help-title { font-size: 16px; font-weight: 700; color: var(--primary); }
.code-toolbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.code-layout { flex: 1; display: flex; min-height: 0; }
.code-sidebar {
    width: 290px;
    flex-shrink: 0;
    padding: 16px;
    border-right: 1px solid var(--border);
    background: var(--surface);
    overflow-y: auto;
}
.code-sidebar .checkbox-group { margin-bottom: 8px; }
.code-files-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 18px 0 8px;
}
.code-files { list-style: none; }
.code-files li {
    padding: 5px 10px;
    border-radius: var(--radius);
    font-family: var(--mono);
    font-size: 12.5px;
    cursor: pointer;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.code-files li:hover { background: var(--bg); }
.code-files li.active { background: #dbeafe; color: var(--primary); font-weight: 600; }
.code-warnings {
    margin-top: 16px;
    padding: 8px 12px;
    background: #fef3c7;
    border: 1px solid #f59e0b;
    border-radius: var(--radius);
    font-size: 12px;
    color: #92400e;
}
.code-warnings ul { margin: 4px 0 0 16px; }
.code-preview-wrapper { flex: 1; min-width: 0; display: flex; flex-direction: column; padding: 16px; }
.code-filename { font-family: var(--mono); font-size: 12px; color: var(--text-muted); margin-bottom: 6px; }
.code-preview {
    flex: 1;
    overflow: auto;
    margin: 0;
    padding: 16px;
    background: #0f172a;
    color: #e2e8f0;
    border-radius: 8px;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.55;
    tab-size: 4;
}
.hl-keyword { color: #c084fc; }
.hl-type { color: #38bdf8; }
.hl-class { color: #fbbf24; }
.hl-string { color: #86efac; }
.hl-number { color: #fb923c; }
.hl-var { color: #f9a8d4; }
.hl-comment { color: #64748b; font-style: italic; }

/* === Help === */
.help-content-wrapper {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
    display: flex;
    justify-content: center;
}
.help-content { font-size: 14px; line-height: 1.75; width: 100%; max-width: 860px; }
.help-content h4 { color: var(--primary); margin: 18px 0 6px; font-size: 15px; }
.help-content ul { margin: 4px 0 8px 24px; }
.help-content p { margin-bottom: 8px; }
.help-content code { font-family: var(--mono); background: #e2e8f0; padding: 0 4px; border-radius: 3px; font-size: 12.5px; }
.help-content table { border-collapse: collapse; margin: 8px 0 12px; font-size: 13px; }
.help-content th, .help-content td { border: 1px solid var(--border); padding: 4px 10px; text-align: left; }
.help-content th { background: var(--surface); }

/* === Onglets des diagrammes === */
.view-tabs {
    display: flex;
    gap: 2px;
    padding: 6px 16px 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

/* Bandeau du verrou d'onglet : cet onglet n'ecrit pas dans la sauvegarde */
.lock-banner {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    padding: 8px 16px;
    background: #fef3c7;
    border-bottom: 1px solid #f59e0b;
    color: #78350f;
    font-size: 13px;
}
.lock-banner-icon { font-size: 15px; line-height: 1; }
.lock-banner-text { flex: 1; }
.lock-banner button {
    border-color: #b45309;
    color: #78350f;
    background: #fffbeb;
    white-space: nowrap;
}
.lock-banner button:hover:not(:disabled) { background: #b45309; color: #fff; border-color: #b45309; }
.view-tab {
    border: 1px solid var(--border);
    border-bottom: none;
    border-radius: 6px 6px 0 0;
    background: #e2e8f0;
    color: var(--text-muted);
    padding: 6px 16px;
    font-weight: 600;
    margin-bottom: -1px;
}
.view-tab.active { background: var(--surface); color: var(--primary); }
.view-tab:hover:not(:disabled) { border-color: var(--border); }
.tab-count { font-size: 11px; background: #dbeafe; color: var(--primary); border-radius: 9px; padding: 0 6px; }
.tab-count:empty { display: none; }
.toolbar-group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

/* === Diagramme de cas d'utilisation === */
#uc-scroll {
    position: absolute;
    inset: 0;
    overflow: auto;
    background-color: var(--bg);
    background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
    background-size: 20px 20px;
}
#uc-canvas { display: block; min-width: 100%; min-height: 100%; user-select: none; }
#uc-canvas .uc-system-group,
#uc-canvas .uc-actor-group,
#uc-canvas .uc-usecase-group { cursor: move; }
#uc-canvas .uc-system-rect { fill: #ffffff; fill-opacity: 0.8; stroke: #475569; stroke-width: 1.5; }
#uc-canvas .uc-system-name { font-family: var(--font); font-size: 14px; font-weight: 600; fill: var(--text); pointer-events: none; }
#uc-canvas .selected .uc-system-rect { stroke: var(--primary); stroke-width: 2.5; stroke-dasharray: 6 3; }
#uc-canvas .resize-handle { fill: var(--primary); cursor: nwse-resize; }
#uc-canvas .uc-actor-figure { fill: #ffffff; stroke: var(--text); stroke-width: 2; }
#uc-canvas path.uc-actor-figure { fill: none; }
#uc-canvas .uc-actor-box { fill: #f1f5f9; stroke: #475569; stroke-width: 1.5; }
#uc-canvas .uc-actor-name { font-family: var(--font); font-size: 12px; font-weight: 600; fill: var(--text); pointer-events: none; }
#uc-canvas .uc-stereotype { font-family: var(--font); font-size: 11px; fill: var(--text-muted); pointer-events: none; }
#uc-canvas .selected .uc-actor-figure,
#uc-canvas .selected .uc-actor-box { stroke: var(--primary); }
#uc-canvas .selected .uc-actor-name { fill: var(--primary); }
#uc-canvas .uc-usecase-ellipse { fill: #fef9c3; stroke: #a16207; stroke-width: 1.5; }
#uc-canvas .uc-usecase-name { font-family: var(--font); font-size: 12.5px; font-weight: 600; fill: var(--text); pointer-events: none; }
#uc-canvas .uc-usecase-name-abstract { font-style: italic; }
#uc-canvas .uc-relation-mult { font-family: var(--font); font-size: 11px; fill: var(--text-muted); pointer-events: none; }
#uc-canvas .uc-usecase-sep { stroke: #a16207; stroke-width: 1; }
#uc-canvas .uc-usecase-ep-title { font-family: var(--font); font-size: 10.5px; font-style: italic; fill: var(--text-muted); pointer-events: none; }
#uc-canvas .uc-usecase-ep { font-family: var(--font); font-size: 10.5px; fill: var(--text); pointer-events: none; }
#uc-canvas .selected .uc-usecase-ellipse { stroke: var(--primary); stroke-width: 3; stroke-dasharray: 5 3; }
#uc-canvas .connect-source .uc-usecase-ellipse,
#uc-canvas .connect-source .uc-actor-figure,
#uc-canvas .connect-source .uc-actor-box { stroke: var(--warning); stroke-width: 3; }
#uc-canvas .uc-relation-group { cursor: pointer; }
#uc-canvas .relation-hit { stroke: transparent; stroke-width: 12; fill: none; }
#uc-canvas .uc-relation-line { stroke: var(--link-color); stroke-width: 1.5; fill: none; pointer-events: none; }
#uc-canvas .relation-dashed { stroke-dasharray: 6 4; }
#uc-canvas .uc-relation-arrow { fill: none; stroke: var(--link-color); stroke-width: 1.5; }
#uc-canvas .uc-relation-triangle { fill: #ffffff; stroke: var(--link-color); stroke-width: 1.5; }
#uc-canvas .relation-label-bg { fill: #ffffff; fill-opacity: 0.92; }
#uc-canvas .uc-relation-label { font-family: var(--font); font-size: 11px; fill: var(--text); pointer-events: none; }
#uc-canvas .uc-relation-group:hover .uc-relation-line { stroke: var(--primary); }
#uc-canvas .selected .uc-relation-line,
#uc-canvas .selected .uc-relation-arrow,
#uc-canvas .selected .uc-relation-triangle { stroke: var(--primary); stroke-width: 2.5; }
#uc-canvas .edit-btn { cursor: pointer; }
#uc-canvas .edit-btn-bg { fill: var(--primary); stroke: #fff; stroke-width: 1.5; }
#uc-canvas .edit-btn-icon { fill: #fff; font-size: 13px; font-weight: 700; pointer-events: none; }
#uc-canvas .drag-handle { cursor: grab; touch-action: none; }
#uc-canvas .drag-handle circle { fill: #64748b; }
@media (hover: hover) {
    #uc-canvas .drag-handle { display: none; }
}
.connection-mode #uc-canvas,
.connection-mode #uc-canvas g { cursor: crosshair; }
.check-list { margin-left: 18px; font-size: 13px; line-height: 1.6; }

/* === Responsive === */
@media (max-width: 1024px) {
    #toolbar { gap: 8px; padding: 6px 10px; }
    button { padding: 5px 10px; font-size: 12px; }
    .panel { width: 330px; }
    .code-sidebar { width: 240px; }
}

@media (max-width: 768px) {
    .toolbar-brand { width: 100%; }
    .toolbar-separator { display: none; }
    button { padding: 5px 8px; font-size: 11px; gap: 3px; }

    .panel {
        position: fixed;
        top: 50%;
        left: 50%;
        right: auto;
        width: 92vw;
        max-width: 440px;
        height: auto;
        max-height: 85vh;
        transform: translate(-50%, -50%);
        border: 1px solid var(--border);
        border-radius: 10px;
        box-shadow: 0 12px 40px rgba(0,0,0,0.3);
        z-index: 200;
    }
    .panel.hidden { display: none; transform: translate(-50%, -50%); }
    #panel:not(.hidden) ~ .panel-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(15,23,42,0.45);
        z-index: 195;
    }

    .code-layout { flex-direction: column; }
    .code-sidebar { width: 100%; max-height: 40vh; border-right: none; border-bottom: 1px solid var(--border); }
    .kind-choice { grid-template-columns: repeat(2, 1fr); }
    #toast-container { left: 8px; right: 8px; }
    .toast { max-width: 100%; }
    .mode-indicator { white-space: normal; font-size: 11px; width: 90%; text-align: center; }
}