/* ═══════════════════════════════════════════════════════════════════
   research.css · Research statement page
   Darkfield concept map (machine-baked, rm-* hooks) + editorial
   statement blocks with a membrane rail.
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Intro block: a spoken-voice pull quote ────────────────────── */
.research-intro {
    border-left: 2px solid var(--accent);
    padding: 0.4rem 0 0.4rem 1.8rem;
    margin: 2.4rem 0 0;
    position: relative;
}
.research-intro::before {
    content: '';
    position: absolute;
    left: -6px; top: -4px;
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 14px var(--accent-glow);
}
.research-intro-body {
    font-family: var(--display);
    font-weight: 440;
    font-size: clamp(1.12rem, 1.9vw, 1.32rem);
    letter-spacing: -0.015em;
    color: var(--text);
    line-height: 1.55;
    margin: 0;
    max-width: 780px;
}
.research-intro-body em { font-style: italic; color: var(--accent); }

/* ─── Statement blocks: numbered editorial sections, no boxes ───── */
.research-sections {
    display: flex;
    flex-direction: column;
    counter-reset: research-block;
}

.research-block {
    counter-increment: research-block;
    position: relative;
    padding: 2.4rem 0 2.5rem 4.4rem;
    border-top: 1px solid var(--border-s);
}
.research-block:first-child { border-top: none; padding-top: 0.6rem; }
/* Ghost chapter numeral in the left gutter */
.research-block::before {
    content: counter(research-block, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 2.15rem;
    font-family: var(--mono);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    color: color-mix(in srgb, var(--accent) 55%, var(--muted));
}
.research-block:first-child::before { top: 0.35rem; }
/* Thin membrane rail that lights up while hovering the block */
.research-block::after {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 4.4rem;
    bottom: 2.2rem;
    width: 1px;
    background: linear-gradient(180deg, var(--accent-glow), transparent);
    opacity: 0;
    transition: opacity var(--t-med) var(--ease);
}
.research-block:first-child::after { top: 2.6rem; }
.research-block:hover::after { opacity: 1; }

.research-block .sec-kicker { margin-bottom: 0.5rem; }
.research-block-title {
    font-family: var(--display);
    font-size: clamp(1.4rem, 2.4vw, 1.72rem);
    font-weight: 520;
    line-height: 1.22;
    letter-spacing: -0.02em;
    color: var(--text);
    margin: 0 0 1.1rem;
}
.research-block-body {
    color: var(--text-soft);
    font-size: 0.98rem;
    line-height: 1.78;
    max-width: 720px;
}
.research-block-body p { margin: 0 0 1rem; }
.research-block-body p:last-child { margin-bottom: 0; }
.research-block-body strong { color: var(--text); font-weight: 600; }
.research-block-body em     { color: var(--text); font-style: italic; }
.research-block-body a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-glow);
    transition: color var(--t-fast) var(--ease);
}
.research-block-body a:hover { color: var(--accent-d); }

/* ─── Final CTA: luminous membrane panel ────────────────────────── */
.research-final {
    background:
        radial-gradient(90% 140% at 0% 0%,
            color-mix(in srgb, var(--accent) 11%, transparent), transparent 55%),
        var(--card);
    border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
    border-radius: var(--radius-l);
    padding: 2.1rem 2.3rem 2.2rem;
    position: relative;
    overflow: hidden;
}
.research-final::after {
    content: '';
    position: absolute;
    right: -60px; bottom: -90px;
    width: 240px; height: 240px;
    border-radius: 50%;
    border: 2px dotted color-mix(in srgb, var(--accent) 32%, transparent);
    pointer-events: none;
}
.research-final-body {
    color: var(--text-soft);
    font-size: var(--fs-body);
    line-height: 1.7;
    max-width: 620px;
    margin-bottom: 1.4rem;
}
.research-final-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.78rem 1.45rem;
    border-radius: 999px;
    background: var(--accent);
    color: var(--bg);
    border: 1px solid var(--accent);
    font-family: var(--body);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: transform var(--t-fast) var(--ease),
                background-color var(--t-fast) var(--ease),
                box-shadow var(--t-fast) var(--ease);
}
.research-final-cta svg { width: 16px; height: 16px; }
.research-final-cta:hover {
    background: var(--accent-d);
    border-color: var(--accent-d);
    transform: translateY(-2px);
    box-shadow: 0 14px 28px -12px var(--accent-glow);
}
.research-final-cta:active { transform: scale(0.97); }
.research-final-sub {
    margin: 1.3rem 0 0;
    font-size: var(--fs-small);
    color: var(--text-soft);
}
.research-final-sub a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-glow);
}
.research-final-sub a:hover { color: var(--accent-d); }

/* ═══════════════════════════════════════════════════════════════════
   RESEARCH MAP · machine-baked (RESEARCH-MAP:BEGIN/END)
   The canvas is a darkfield micrograph: deep vignette, luminous
   concept nodes, quieter topic satellites. research-map.js adds the
   spring simulation and rm-node--focus / --dim states.
   ═══════════════════════════════════════════════════════════════════ */
.research-map {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-l);
    padding: 2rem 2.2rem 1.6rem;
    margin: 1.6rem 0 0;
    position: relative;
    overflow: hidden;
}
.research-map::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(60% 70% at 18% 12%,
            color-mix(in srgb, var(--accent) 7%, transparent), transparent 60%),
        radial-gradient(46% 56% at 86% 88%,
            color-mix(in srgb, var(--amber) 4%, transparent), transparent 60%);
    pointer-events: none;
}
.research-map .sec-kicker,
.research-map .sec-title,
.research-map-lede {
    position: relative;
    z-index: 1;
}
.research-map-lede {
    color: var(--text-soft);
    font-size: var(--fs-small);
    line-height: 1.65;
    max-width: 720px;
    margin: 0.6rem 0 1.3rem;
}
.research-map-canvas {
    position: relative;
    z-index: 1;
    width: 100%;
    aspect-ratio: 1000 / 560;
    border-radius: var(--radius);
    background:
        radial-gradient(70% 80% at 50% 45%,
            color-mix(in srgb, var(--accent) 5%, transparent), transparent 78%),
        color-mix(in srgb, var(--bg-deep) 70%, var(--card));
    overflow: hidden;
}
.research-map-svg {
    width: 100%;
    height: 100%;
    display: block;
    cursor: grab;
    -webkit-user-select: none;
            user-select: none;
}

/* Edges */
.rm-edges { pointer-events: none; }
.rm-edge {
    stroke: color-mix(in srgb, var(--accent) 30%, transparent);
    stroke-linecap: round;
    transition: stroke var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.rm-edge--focus {
    stroke: var(--accent);
    stroke-width: 1.8 !important;
    opacity: 1;
}
.rm-edge--dim { opacity: 0.15; }

/* Nodes */
.rm-node {
    cursor: pointer;
    transition: opacity var(--t-med) var(--ease);
}
.rm-node--dim { opacity: 0.32; }
.rm-node--focus .rm-node-disc {
    filter: drop-shadow(0 0 16px var(--accent-glow));
}
.rm-node--dragging { cursor: grabbing; }

.rm-node-disc {
    fill: color-mix(in srgb, var(--card-soft) 88%, var(--accent));
    stroke: var(--border);
    stroke-width: 1.4;
    transition: fill var(--t-fast) var(--ease), stroke var(--t-fast) var(--ease);
}
.rm-node-label {
    fill: var(--text);
    font-family: var(--body);
    font-size: 11.5px;
    font-weight: 500;
    letter-spacing: 0.1px;
    pointer-events: none;
}

/* Centre: the luminous nucleus */
.rm-node--center .rm-node-disc {
    fill: var(--accent);
    stroke: var(--accent);
}
.rm-node--center .rm-node-label {
    fill: var(--bg);
    font-size: 12.5px;
    font-weight: 700;
}
/* Concepts: bright membrane rings */
.rm-node--concept .rm-node-disc {
    fill: color-mix(in srgb, var(--accent) 15%, transparent);
    stroke: color-mix(in srgb, var(--accent) 60%, transparent);
}
.rm-node--concept .rm-node-label {
    font-size: 12px;
    font-weight: 600;
    fill: var(--accent);
}
/* Topics: quieter satellites, warmed with gold */
.rm-node--topic .rm-node-disc {
    fill: color-mix(in srgb, var(--amber) 8%, transparent);
    stroke: color-mix(in srgb, var(--amber) 45%, transparent);
}
.rm-node--topic .rm-node-label {
    font-size: 10.5px;
    fill: var(--text-soft);
}

.rm-node:hover .rm-node-disc,
.rm-node:focus .rm-node-disc {
    stroke-width: 2.2;
}
.rm-node--focus.rm-node--concept .rm-node-disc {
    fill: color-mix(in srgb, var(--accent) 30%, transparent);
}
.rm-node--focus.rm-node--topic .rm-node-disc {
    fill: color-mix(in srgb, var(--amber) 22%, transparent);
}

/* ─── Responsive ───────────────────────────────────────────────── */
@media (max-width: 640px) {
    .research-block { padding-left: 2.6rem; }
    .research-block::before { font-size: 0.8rem; }
    .research-intro { padding-left: 1.2rem; }
    .research-final { padding: 1.6rem 1.5rem; }
    .research-map   { padding: 1.4rem 1.3rem 1rem; }
    .rm-node-label  { font-size: 9.5px; }
    .rm-node--center .rm-node-label { font-size: 10.5px; }
    .rm-node--concept .rm-node-label { font-size: 10px; }
    .rm-node--topic .rm-node-label   { font-size: 8.5px; }
}