/* ============================================
   poroCity — Ricerche (diagramma a cerchi + overlay)
   ============================================ */

/* ---- Diagram container ---- */
.diagram-container {
    position: relative;
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
}

.diagram-svg {
    width: 100%;
    height: auto;
}

/* ---- SVG nodes ---- */
.diagram-node {
    cursor: pointer;
    transform-box: fill-box;
    transform-origin: center;
    transition: transform 0.25s ease, opacity 0.3s ease;
}

.diagram-node:hover {
    transform: scale(1.15);
}

.diagram-node:hover .node-circle {
    filter: brightness(1.15) drop-shadow(0 0 6px rgba(0, 0, 0, 0.15));
}

.diagram-node:hover .node-circle-glow {
    opacity: 0.6;
}

.diagram-node:hover .node-label {
    fill: #fff;
}

.diagram-node.active {
    transform: scale(1.1);
}

.diagram-node.active .node-circle-glow {
    opacity: 0.55;
}

.diagram-node.dimmed {
    opacity: 0.3;
    pointer-events: none;
}

.node-circle {
    transition: filter 0.25s ease;
}

.node-circle-glow {
    opacity: 0.35;
    transition: opacity 0.25s ease;
}

.node-label {
    font-family: 'Manrope', sans-serif;
    font-weight: 800;
    fill: #fff;
    transition: fill 0.2s ease;
}

.diagram-line {
    stroke: var(--color-grey-light);
    stroke-width: 1.5;
    stroke-dasharray: 6 4;
    transition: opacity 0.3s ease;
}

.diagram-line.dimmed {
    opacity: 0.15;
}

/* ---- Branch labels ---- */
.branch-label {
    font-family: 'Manrope', sans-serif;
    font-weight: 800;
    font-size: 10px;
    fill: var(--color-accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    transition: opacity 0.3s ease;
}

.branch-label.dimmed {
    opacity: 0.15;
}

/* ---- Node overlay (content bubble) ---- */
.node-overlay {
    position: absolute;
    transform: translate(-50%, -50%) scale(0.5);
    width: 320px;
    max-width: 80%;
    background: var(--color-white);
    border: 3px solid var(--color-accent);
    border-radius: 20px;
    padding: var(--space-md);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.12);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    z-index: 50;
}

.node-overlay.open {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

.node-overlay__inner {
    position: relative;
}

.node-overlay__close {
    position: absolute;
    top: -8px;
    right: -4px;
    background: none;
    border: none;
    font-size: 1.3rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    transition: color var(--transition-fast);
}

.node-overlay__close:hover {
    color: var(--color-text);
}

.node-overlay__title {
    font-weight: var(--font-weight-bold);
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
    padding-right: var(--space-md);
}

.node-overlay__text {
    font-weight: var(--font-weight-light);
    font-size: 0.8rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    max-width: 100%;
}

.node-overlay__children {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.node-overlay__child {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px solid var(--color-grey-light);
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: var(--font-weight-bold);
    font-size: 0.65rem;
    letter-spacing: 0.05em;
    color: var(--color-text);
    padding: 5px 12px;
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.node-overlay__child:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.node-overlay__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.node-overlay__cta {
    display: inline-flex;
    align-items: center;
    background: var(--color-accent);
    color: var(--color-white);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-pill);
    font-family: var(--font-family);
    font-weight: var(--font-weight-bold);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    padding: 6px 14px;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.node-overlay__cta:hover {
    background: var(--color-text);
    border-color: var(--color-text);
    color: var(--color-white);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .node-overlay {
        /* Centro rispetto al viewport, ignoro top/left impostati inline da JS */
        position: fixed !important;
        top: 50% !important;
        left: 50% !important;
        width: calc(100vw - 2 * var(--space-md));
        max-width: 360px;
        padding: var(--space-sm);
    }

    .node-overlay__title {
        font-size: 0.95rem;
    }

    .node-overlay__text {
        font-size: 0.75rem;
    }
}