/* ===== CANVAS ===== */
.canvas-container {
    position: fixed;
    top: var(--toolbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    touch-action: none; /* gestos do toque vão para pan/arrasto do canvas */
    cursor: grab;
    /* Fundo escuro + dots como background do container.
       Desenho centralizado: opacidade e diâmetro vêm de --dot-opacity e
       --dot-size (definidas em base.css e ajustáveis no board standalone).
       O espaçamento fica fixo (background-size) e o zoom o reescala em canvas.js. */
    background-color: #08080d;
    background-image: radial-gradient(
        circle,
        rgba(255, 255, 255, var(--dot-opacity, 0.18)) var(--dot-size, 1.5px),
        transparent var(--dot-size, 1.5px)
    );
    background-size: 65px 65px;
}

.canvas-container:active { cursor: grabbing; }
.canvas-container.tool-select { cursor: default; }
.canvas-container.tool-note,
.canvas-container.tool-flowchart,
.canvas-container.tool-kanban,
.canvas-container.tool-list { cursor: crosshair; }
.canvas-container.tool-connect { cursor: crosshair; }

/* SVG de conexões — dentro de .canvas, se transforma com pan/zoom */
/* Blur layer — acima do canvas background, abaixo do conteúdo visual dos nodes */
.blur-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.blur-ghost {
    position: absolute;
    border-radius: var(--radius-lg);
    pointer-events: none;
    /* Dots viram estrelinhas de 4 pontas via SVG filter */
}

/* SVG filter para efeito de cruz/estrela de 4 pontas */
.blur-ghost::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    -webkit-backdrop-filter: blur(1px) brightness(1.5);
    backdrop-filter: blur(1px) brightness(1.5);
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='f'%3E%3CfeGaussianBlur stdDeviation='0,3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23f)' fill='white'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='f'%3E%3CfeGaussianBlur stdDeviation='0,3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23f)' fill='white'/%3E%3C/svg%3E");
}

/* Camada horizontal do brilho */
.blur-ghost::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    -webkit-backdrop-filter: blur(1px) brightness(1.3);
    backdrop-filter: blur(1px) brightness(1.3);
}

.canvas {
    position: absolute;
    width: 100%;
    height: 100%;
    transform-origin: 0 0;
    z-index: 2;
    pointer-events: none;
}

.connections-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: visible;
}

/* Arestas com seta: o path recebe marker-end apontando para um <marker> em <defs>. */
.connections-layer > path.connection-edge {
    pointer-events: stroke;
    cursor: pointer;
}

.connections-layer > path.connection-edge:hover {
    stroke-width: 3px;
}

/* Triângulo da seta dentro do <marker> — a cor vem da própria conexão. */
.connections-layer .connection-arrow path {
    stroke: none;
    pointer-events: none;
}

.nodes-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    /* A camada é só um contêiner: não deve capturar cliques nas áreas vazias,
       senão as arestas (hover + clique direito) ficam inalcançáveis. */
    pointer-events: none;
}

.nodes-layer > * {
    pointer-events: auto;
}

/* ===== TEMP CONNECTION ===== */
.temp-connection {
    stroke: var(--accent);
    stroke-width: 2px;
    stroke-dasharray: 6 4;
    fill: none;
    pointer-events: none;
}

/* ===== CONTEXT MENU ===== */
.context-menu {
    position: fixed;
    z-index: 2000;
    min-width: 180px;
    padding: 6px;
    background: rgba(20, 20, 30, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    display: none;
}

.context-menu.visible {
    display: block;
    animation: contextIn 0.15s ease;
}

@keyframes contextIn {
    from { opacity: 0; transform: scale(0.95) translateY(-4px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.context-menu button {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-family: var(--font);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.1s;
}

.context-menu button:hover {
    background: rgba(255,255,255,0.08);
    color: var(--text-primary);
}

.context-menu button[data-action="delete"] { color: var(--danger); }

.context-separator {
    height: 1px;
    background: rgba(255,255,255,0.06);
    margin: 4px 0;
}

/* ===== COLOR PICKER ===== */
.color-picker {
    position: fixed;
    z-index: 2500;
    display: none;
    gap: 6px;
    padding: 10px;
    background: rgba(20, 20, 30, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    flex-wrap: wrap;
    max-width: 180px;
}

.color-picker.visible {
    display: flex;
    animation: contextIn 0.15s ease;
}

.color-picker button {
    width: 28px;
    height: 28px;
    border: 2px solid transparent;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.15s;
}

.color-picker button:hover {
    transform: scale(1.2);
    border-color: white;
}

/* ===== NAV BUTTON (flutuante) ===== */
.canvas-nav {
    position: fixed;
    bottom: 20px;
    left: 20px;
    z-index: 900;
    display: flex;
    gap: 4px;
}

.canvas-nav button {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: rgba(20, 20, 30, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    transition: all 0.15s;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.canvas-nav button:hover {
    background: rgba(30, 30, 45, 0.95);
    color: var(--text-primary);
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

/* ===== CONTROLE DOS DOTS DO FUNDO (board standalone) ===== */
.board-dots-panel {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 950;
    width: 232px;
    padding: 12px 14px 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: rgba(20, 20, 30, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    color: var(--text-secondary);
    font-family: var(--font);
}

.board-dots-panel h2 {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.board-dots-field {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px 10px;
    align-items: center;
}

.board-dots-field label {
    grid-column: 1 / -1;
    font-size: 12px;
    color: var(--text-secondary);
}

.board-dots-field input[type="range"] {
    width: 100%;
    height: 16px;
    margin: 0;
    background: transparent;
    accent-color: var(--accent);
    cursor: pointer;
}

.board-dots-field input[type="range"]:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

.board-dots-field output {
    min-width: 40px;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
    text-align: right;
    color: var(--text-secondary);
}