:root {
    --page-background: linear-gradient(135deg, #eef6ff 0%, #f8fafc 48%, #fefce8 100%);
    --panel-background: rgba(255, 255, 255, 0.78);
    --surface-background: rgba(255, 255, 255, 0.92);
    --surface-border: rgba(148, 163, 184, 0.35);
    --ink: #1e293b;
    --muted: #64748b;
    --soft-ink: #334155;
    --shadow: 0 18px 48px rgba(15, 23, 42, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    padding: 32px;
    background: var(--page-background);
    color: var(--ink);
    font-family: "Aptos", "Segoe UI", sans-serif;
}

.page-stack {
    width: min(1400px, 100%);
    margin: 0 auto;
    display: grid;
    gap: 20px;
}

#cascade-container {
    width: 100%;
    background: var(--panel-background);
    border: 1px solid var(--surface-border);
    border-radius: 24px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
    overflow: hidden;
}

.cascade-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
}

.graph-column {
    position: relative;
    min-width: 0;
    padding: 24px 24px 18px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(248, 250, 252, 0.9));
}

#graph svg {
    display: block;
    max-width: 100%;
    height: auto;
}

.details-panel {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    padding: 32px 28px;
    border-left: 1px solid rgba(148, 163, 184, 0.24);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(241, 245, 249, 0.92));
}

#details-title {
    margin: 0;
    font-size: 32px;
    line-height: 1.05;
}

/* --- Slider UI Styles --- */
.details-sliders {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 16px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.24);
}

.slider-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--soft-ink);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.slider-val {
    color: #2563eb;
    font-size: 20px;
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    letter-spacing: normal;
}

input[type="range"] {
    width: 100%;
    cursor: pointer;
    accent-color: #2563eb;
}

input[type="range"]:disabled {
    cursor: not-allowed;
    opacity: 0.4;
    filter: grayscale(100%);
}

.details-description {
    margin: 0;
    color: var(--soft-ink);
    font-size: 15px;
    line-height: 1.65;
}

.overview-panel {
    padding: 28px 30px 32px;
    border: 1px solid var(--surface-border);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.82);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.overview-kicker {
    margin: 0 0 8px;
    color: #0f766e;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.overview-title {
    margin: 0 0 14px;
    font-size: 28px;
    line-height: 1.1;
}

.overview-text {
    max-width: 980px;
    margin: 0;
    color: var(--soft-ink);
    font-size: 15px;
    line-height: 1.7;
}

.overview-text + .overview-text {
    margin-top: 12px;
}

.node {
    cursor: pointer;
}

.node-box {
    transition:
        stroke 0.12s ease,
        stroke-width 0.12s ease,
        fill 0.12s ease;
}

.node:hover .node-box {
    stroke: #2563eb;
    stroke-width: 3px;
}

.node.is-active .node-box {
    fill: #dbeafe;
    stroke: #0f172a;
    stroke-width: 3px;
}

.node-l1 {
    cursor: ew-resize;
}

.node-label {
    fill: var(--soft-ink);
    font-size: 12px;
    font-weight: 600;
    text-anchor: middle;
    pointer-events: none;
}

.node-value {
    fill: var(--muted);
    font-size: 10px;
    text-anchor: middle;
    pointer-events: none;
}

.link {
    fill: none;
    stroke: #cbd5e1;
    transition:
        stroke-width 0.12s ease,
        stroke 0.12s ease;
}

.axis-label {
    fill: var(--muted);
    font-size: 12px;
    font-weight: 700;
    text-anchor: middle;
    text-transform: uppercase;
    letter-spacing: 1.4px;
}

@media (max-width: 1180px) {
    body {
        padding: 20px;
    }

    .cascade-layout {
        grid-template-columns: 1fr;
    }

    .details-panel {
        border-top: 1px solid rgba(148, 163, 184, 0.24);
        border-left: 0;
    }
}

@media (max-width: 720px) {
    body {
        padding: 12px;
    }

    .graph-column {
        padding: 16px;
    }

    .details-panel {
        padding: 24px 20px;
    }

    .overview-panel {
        padding: 24px 20px 26px;
    }

    #details-title {
        font-size: 26px;
    }

    .details-value {
        font-size: 34px;
    }

    .overview-title {
        font-size: 24px;
    }
}

/* --- Related Frameworks Side-Menu Styles --- */
.frameworks-layout {
    display: flex;
    gap: 32px;
    margin-top: 24px;
}

.frameworks-menu {
    flex: 0 0 260px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.framework-menu-item {
    padding: 14px 18px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--surface-border);
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    color: var(--soft-ink);
    transition: all 0.2s ease;
    text-align: left;
    font-family: inherit;
}

.framework-menu-item:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: #cbd5e1;
    color: var(--ink);
}

.framework-menu-item.is-active {
    background: #2563eb;
    color: #ffffff;
    border-color: #2563eb;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.frameworks-content-panel {
    flex: 1;
    padding: 32px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--surface-border);
    border-radius: 16px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.framework-detail-title {
    margin: 0 0 20px 0;
    font-size: 24px;
    color: var(--ink);
    line-height: 1.2;
}

.framework-detail-text {
    color: var(--soft-ink);
    font-size: 15px;
    line-height: 1.7;
}

/* Allow standard HTML styling inside the detail text */
.framework-detail-text p {
    margin-top: 0;
    margin-bottom: 1.2em;
}

.framework-detail-text p:last-child {
    margin-bottom: 0;
}

.framework-detail-text strong,
.framework-detail-text b {
    color: var(--ink);
    font-weight: 700;
}

.framework-detail-text ul {
    margin-top: 0;
    margin-bottom: 1.2em;
    padding-left: 24px;
}

.framework-detail-text li {
    margin-bottom: 8px;
}

@media (max-width: 850px) {
    .frameworks-layout {
        flex-direction: column;
        gap: 20px;
    }

    .frameworks-menu {
        flex: auto;
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 12px;
        -webkit-overflow-scrolling: touch;
    }

    .framework-menu-item {
        white-space: nowrap;
        flex: 0 0 auto;
    }
}

.link.connected {
    stroke: #2563eb; /* Highlight color */
    stroke-width: 4px;
    opacity: 1;
}

/* Dim non-connected links when something is active */
.link:not(.connected) {
    opacity: 0.2;
}