/*
 * Styles for graph.html (the parties graph). The colour tokens and the dark-mode block mirror
 * stocks.css so the three pages look like one site. Node and edge colours are set once per type as
 * an inherited custom property (--node-color / --edge-color), so the circle, the legend dot, the
 * filter chip and the panel swatch for one type all read from the same variable.
 */

:root {
    color-scheme: light;
    --page-bg: #ffffff;
    --page-text: #111827;
    --panel-border: #d1d5db;
    --muted-text: #6b7280;
    --control-bg: #ffffff;
    --control-text: #111827;
    --control-border: #9ca3af;
    --link-color: #2563eb;
    --card-bg: #ffffff;
    --sunken-bg: #f9fafb;
    --accent: #8b5cf6;
    --sev-caution: #b45309;
    --sev-critical: #b91c1c;

    --type-programme: #7c3aed;
    --type-security-issuer: #b91c1c;
    --type-token-issuer: #c2410c;
    --type-tokenization-provider: #a16207;
    --type-transfer-agent: #15803d;
    --type-custodian: #0f766e;
    --type-verification-agent: #0369a1;
    --type-parent: #4338ca;
    --type-regulator: #475569;
    --type-distributor: #be185d;
    --type-dex: #0e7490;
    --type-lending: #4d7c0f;
    --type-audience: #6b7280;
}

@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
        --page-bg: #0f1117;
        --page-text: #f9fafb;
        --panel-border: #374151;
        --muted-text: #9ca3af;
        --control-bg: #111827;
        --control-text: #f9fafb;
        --control-border: #4b5563;
        --link-color: #93c5fd;
        --card-bg: #151922;
        --sunken-bg: #1f2937;
        --sev-caution: #fbbf24;
        --sev-critical: #f87171;

        --type-programme: #a78bfa;
        --type-security-issuer: #f87171;
        --type-token-issuer: #fb923c;
        --type-tokenization-provider: #fbbf24;
        --type-transfer-agent: #4ade80;
        --type-custodian: #2dd4bf;
        --type-verification-agent: #60a5fa;
        --type-parent: #818cf8;
        --type-regulator: #cbd5e1;
        --type-distributor: #f472b6;
        --type-dex: #22d3ee;
        --type-lending: #a3e635;
        --type-audience: #9ca3af;
    }
}

* {
    box-sizing: border-box;
}

body {
    background: var(--page-bg);
    color: var(--page-text);
    font-family: system-ui, sans-serif;
    margin: 24px;
    overflow-x: hidden;
}

a {
    color: var(--link-color);
}

h1 {
    margin: 0;
    font-size: 1.6rem;
}

h2 {
    font-size: 1.15rem;
    margin: 0 0 8px;
}

section {
    margin: 0 0 22px;
}

/* --- header ----------------------------------------------------------- */

.page-header {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin: 0 0 12px;
}

.brand svg {
    width: 44px;
    height: 44px;
    display: block;
}

.back-link {
    font-size: 0.9rem;
    white-space: nowrap;
}

.page-header .back-link:first-of-type {
    margin-left: auto;
}

.method-note {
    margin: 0 0 10px;
    max-width: 82ch;
    line-height: 1.55;
}

.status {
    margin: 0 0 16px;
    font-size: 0.88rem;
    color: var(--muted-text);
}

.status-error {
    color: var(--sev-critical);
    font-weight: 600;
}

.sample-banner {
    margin: 0 0 14px;
    padding: 8px 12px;
    border: 1px solid var(--sev-caution);
    border-radius: 8px;
    background: var(--sunken-bg);
    font-size: 0.88rem;
}

/* --- controls --------------------------------------------------------- */

.controls {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 12px;
    margin: 0 0 12px;
}

.control-field {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}

.control-field label {
    font-size: 0.72rem;
    color: var(--muted-text);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.control-field select,
.control-field input {
    padding: 7px 9px;
    border: 1px solid var(--control-border);
    border-radius: 8px;
    background: var(--control-bg);
    color: var(--control-text);
    font: inherit;
    font-size: 0.88rem;
    max-width: 100%;
}

#focusProgramme {
    max-width: 320px;
}

.control-toggles {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--page-text);
}

.ghost-button {
    padding: 7px 13px;
    border: 1px solid var(--control-border);
    border-radius: 8px;
    background: var(--control-bg);
    color: var(--control-text);
    font: inherit;
    font-size: 0.84rem;
    cursor: pointer;
}

.ghost-button:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.ghost-button-small {
    padding: 2px 8px;
    font-size: 0.74rem;
}

/* --- relation chips --------------------------------------------------- */

.chips-row {
    margin: 0 0 12px;
}

.chips-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 6px;
    font-size: 0.72rem;
    color: var(--muted-text);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px 4px 8px;
    border: 1px solid var(--edge-color, var(--control-border));
    border-left-width: 5px;
    border-radius: 999px;
    background: var(--card-bg);
    color: var(--page-text);
    font: inherit;
    font-size: 0.78rem;
    cursor: pointer;
}

.chip:hover {
    background: var(--sunken-bg);
}

.chip[aria-pressed="false"] {
    opacity: 0.42;
    border-left-color: var(--control-border);
    text-decoration: line-through;
}

.chip-count {
    color: var(--muted-text);
    font-variant-numeric: tabular-nums;
    font-size: 0.72rem;
}

/* --- the graph and its panel ------------------------------------------ */

.graph-section {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 14px;
    align-items: start;
    margin: 0 0 22px;
}

.graph-stage {
    position: relative;
    min-width: 0;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    background: var(--sunken-bg);
    overflow: hidden;
}

#graphSvg {
    display: block;
    width: 100%;
    height: min(72vh, 780px);
    touch-action: none;
    cursor: grab;
}

.graph-stage.is-grabbing #graphSvg {
    cursor: grabbing;
}

.stage-hint {
    position: absolute;
    left: 10px;
    bottom: 8px;
    margin: 0;
    padding: 3px 8px;
    border-radius: 6px;
    background: var(--card-bg);
    border: 1px solid var(--panel-border);
    color: var(--muted-text);
    font-size: 0.72rem;
    pointer-events: none;
}

/* Edges: colour and width come from the type; the stroke width is set as an attribute. */
.edge {
    stroke: var(--edge-color, var(--panel-border));
    stroke-opacity: 0.55;
    stroke-linecap: round;
    fill: none;
}

.edge.is-incident {
    stroke-opacity: 0.95;
}

.edge.is-dimmed {
    stroke-opacity: 0.08;
}

.edge.is-off {
    visibility: hidden;
}

.edge.edge-lends-on {
    stroke-dasharray: 7 5;
}

/* There are more traded-on edges than all the party relations put together, and they carry the
   only wide strokes, so at full opacity they bury the structure the page is actually about. */
.edge.edge-traded-on {
    stroke-opacity: 0.32;
}

.edge.edge-traded-on.is-incident {
    stroke-opacity: 0.9;
}

/* Dashed because the listed company only lends its price: it is not a participant. */
.edge.edge-references {
    stroke-dasharray: 3 4;
    stroke-opacity: 0.45;
}

/* The chip and the panel swatch carry the same dash, so the legend matches the line. */
.chip.edge-references,
.chip.edge-lends-on {
    border-left-style: dashed;
}

.group-swatch.edge-references,
.group-swatch.edge-lends-on {
    background: repeating-linear-gradient(90deg,
            var(--edge-color, var(--muted-text)) 0 3px,
            transparent 3px 6px);
}

/* Nodes */
.node {
    cursor: pointer;
}

.node-dot {
    fill: var(--node-color, var(--muted-text));
    stroke: var(--page-bg);
    stroke-width: 1.5;
}

.node.is-dimmed .node-dot,
.node.is-faded .node-dot {
    fill-opacity: 0.16;
    stroke-opacity: 0.2;
}

.node.is-neighbour .node-dot {
    stroke: var(--node-color, var(--accent));
    stroke-width: 2;
}

.node.is-selected .node-dot {
    stroke: var(--page-text);
    stroke-width: 3;
}

.node.is-match .node-dot {
    stroke: var(--accent);
    stroke-width: 3;
}

.node-label {
    fill: var(--page-text);
    font-family: system-ui, sans-serif;
    font-size: 11px;
    paint-order: stroke;
    stroke: var(--sunken-bg);
    stroke-width: 3;
    stroke-linejoin: round;
    opacity: 0;
    pointer-events: none;
}

.node-programme .node-label {
    font-size: 12.5px;
    font-weight: 600;
    opacity: 1;
}

.node:hover .node-label,
.node:focus .node-label,
.node.is-selected .node-label,
.node.is-match .node-label {
    opacity: 1;
}

#graphRoot.show-all-labels .node-label {
    opacity: 1;
}

.node.is-dimmed .node-label,
.node.is-faded .node-label {
    opacity: 0;
}

#graphRoot.show-all-labels .node.is-dimmed .node-label,
#graphRoot.show-all-labels .node.is-faded .node-label {
    opacity: 0.2;
}

/* --- side panel ------------------------------------------------------- */

.node-panel {
    width: 340px;
    max-height: min(72vh, 780px);
    overflow-y: auto;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    background: var(--card-bg);
}

.panel-head {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    border-bottom: 1px solid var(--panel-border);
    position: sticky;
    top: 0;
    background: var(--card-bg);
}

.panel-head h2 {
    margin: 0;
    font-size: 1rem;
    overflow-wrap: anywhere;
}

.panel-type {
    margin: 2px 0 0;
    font-size: 0.75rem;
    color: var(--muted-text);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.panel-close {
    margin-left: auto;
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid var(--control-border);
    background: var(--control-bg);
    color: var(--control-text);
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
}

.panel-close:hover {
    border-color: var(--sev-critical);
    color: var(--sev-critical);
}

.panel-body {
    padding: 10px 14px 16px;
}

.panel-facts {
    display: grid;
    gap: 5px;
    margin: 0 0 10px;
}

.panel-fact {
    display: grid;
    grid-template-columns: 112px 1fr;
    gap: 8px;
}

.panel-fact dt {
    font-size: 0.74rem;
    color: var(--muted-text);
}

.panel-fact dd {
    margin: 0;
    font-size: 0.82rem;
    line-height: 1.45;
    overflow-wrap: anywhere;
}

.panel-note {
    margin: 0 0 10px;
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--page-text);
}

.panel-link {
    margin: 0 0 8px;
    font-size: 0.8rem;
    overflow-wrap: anywhere;
}

.panel-subhead {
    margin: 12px 0 6px;
    font-size: 0.82rem;
    border-top: 1px solid var(--panel-border);
    padding-top: 10px;
}

.panel-count {
    color: var(--muted-text);
    font-weight: 400;
    font-variant-numeric: tabular-nums;
}

.panel-hint,
.panel-empty {
    margin: 0 0 8px;
    font-size: 0.78rem;
    color: var(--muted-text);
    line-height: 1.45;
}

.panel-group {
    margin: 0 0 10px;
}

.panel-group-off {
    opacity: 0.55;
}

.panel-group h4 {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0 0 4px;
    font-size: 0.78rem;
    text-transform: lowercase;
}

.group-swatch {
    width: 14px;
    height: 4px;
    border-radius: 2px;
    background: var(--edge-color, var(--muted-text));
    flex: 0 0 auto;
}

.panel-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 5px;
}

.panel-list li {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 7px;
    padding: 6px 8px;
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: var(--sunken-bg);
    font-size: 0.8rem;
}

.panel-jump {
    padding: 0;
    border: none;
    background: none;
    color: var(--link-color);
    font: inherit;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    overflow-wrap: anywhere;
}

.panel-jump:hover {
    text-decoration: underline;
}

.panel-chip {
    color: var(--node-color, var(--muted-text));
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.panel-weight {
    margin-left: auto;
    font-variant-numeric: tabular-nums;
    font-size: 0.78rem;
    font-weight: 600;
}

.panel-via,
.panel-connection-note {
    flex-basis: 100%;
    color: var(--muted-text);
    font-size: 0.72rem;
    line-height: 1.4;
}

/* --- legend and notes ------------------------------------------------- */

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--node-color, var(--muted-text));
    flex: 0 0 auto;
}

/* Matches the square glyph the graph gives an audience node. */
.legend-dot-square {
    border-radius: 2px;
}

.legend-count {
    color: var(--muted-text);
    font-variant-numeric: tabular-nums;
    font-size: 0.74rem;
}

.notes-list {
    margin: 0;
    padding-left: 20px;
    max-width: 88ch;
}

.notes-list li {
    margin: 0 0 7px;
    font-size: 0.86rem;
    line-height: 1.5;
}

.page-foot {
    border-top: 1px solid var(--panel-border);
    padding-top: 10px;
    font-size: 0.84rem;
    color: var(--muted-text);
}

/* --- node colour per type --------------------------------------------- */

.type-programme {
    --node-color: var(--type-programme);
}

.type-security-issuer {
    --node-color: var(--type-security-issuer);
}

.type-token-issuer {
    --node-color: var(--type-token-issuer);
}

.type-tokenization-provider {
    --node-color: var(--type-tokenization-provider);
}

.type-transfer-agent {
    --node-color: var(--type-transfer-agent);
}

.type-custodian {
    --node-color: var(--type-custodian);
}

.type-verification-agent {
    --node-color: var(--type-verification-agent);
}

.type-parent {
    --node-color: var(--type-parent);
}

.type-regulator {
    --node-color: var(--type-regulator);
}

.type-distributor {
    --node-color: var(--type-distributor);
}

.type-dex {
    --node-color: var(--type-dex);
}

.type-lending {
    --node-color: var(--type-lending);
}

.type-audience {
    --node-color: var(--type-audience);
}

/* --- edge colour per relation, mapped to the party type it names ------ */

.edge-issues {
    --edge-color: var(--type-security-issuer);
}

.edge-references {
    --edge-color: var(--type-security-issuer);
}

.edge-wraps {
    --edge-color: var(--type-token-issuer);
}

.edge-tokenizes-for {
    --edge-color: var(--type-tokenization-provider);
}

.edge-keeps-register {
    --edge-color: var(--type-transfer-agent);
}

.edge-custodies {
    --edge-color: var(--type-custodian);
}

.edge-verifies {
    --edge-color: var(--type-verification-agent);
}

.edge-distributes {
    --edge-color: var(--type-distributor);
}

.edge-traded-on {
    --edge-color: var(--type-dex);
}

.edge-lends-on {
    --edge-color: var(--type-lending);
}

.edge-regulated-by {
    --edge-color: var(--type-regulator);
}

.edge-owned-by {
    --edge-color: var(--type-parent);
}

.edge-offered-to {
    --edge-color: var(--type-audience);
}

/* --- mobile ----------------------------------------------------------- */

@media (max-width: 760px) {
    body {
        margin: 12px;
    }

    h1 {
        font-size: 1.22rem;
    }

    .page-header .back-link:first-of-type {
        margin-left: 0;
    }

    .graph-section {
        grid-template-columns: 1fr;
    }

    #graphSvg {
        height: 62vh;
    }

    .control-field {
        flex: 1 1 100%;
    }

    #focusProgramme,
    .control-field select,
    .control-field input {
        max-width: none;
        width: 100%;
    }

    /* The panel becomes a bottom sheet, so the graph keeps the full viewport width. */
    .node-panel {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 20;
        width: auto;
        max-height: 58vh;
        border-width: 1px 0 0;
        border-radius: 14px 14px 0 0;
        box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.28);
    }

    .panel-fact {
        grid-template-columns: 1fr;
        gap: 1px;
    }

    .stage-hint {
        font-size: 0.68rem;
    }
}