/* ═══════════════════════════════════════════════════════════════════
   research.css — Research statement / vision page
   ═══════════════════════════════════════════════════════════════════ */

.sub-hero .sub-lede {
    max-width: 640px;
    margin-top: 1.2rem;
    font-size: 1rem;
    color: var(--text-soft);
    line-height: 1.7;
}

/* ─── Intro paragraph block ────────────────────────────────────── */
.research-intro {
    background: var(--card);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius);
    padding: 1.6rem 1.9rem 1.7rem;
    margin: 1rem 0 0;
    position: relative;
}
.research-intro-body {
    font-family: var(--display);
    font-style: italic;
    font-weight: 300;
    font-size: 1.1rem;
    color: var(--text-soft);
    line-height: 1.65;
    margin: 0;
    max-width: 760px;
}

/* ─── Research statement section cards ─────────────────────────── */
.research-sections {
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
}

.research-block {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.9rem 2.1rem 2rem;
    position: relative;
    overflow: hidden;
    transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.research-block::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 2px;
    background: var(--accent);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform .35s var(--ease);
}
.research-block:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-card);
}
.research-block:hover::before { transform: scaleY(1); }

.research-block .sec-kicker {
    margin-bottom: 0.4rem;
}
.research-block-title {
    font-family: var(--display);
    font-size: clamp(1.4rem, 2.4vw, 1.7rem);
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.01em;
    color: var(--text);
    margin: 0 0 1rem;
}
.research-block-body {
    color: var(--text-soft);
    font-size: 0.98rem;
    line-height: 1.78;
    max-width: 760px;
}
.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 .2s;
}
.research-block-body a:hover { color: var(--accent-d); }

/* ─── Final CTA ───────────────────────────────────────────────── */
.research-final {
    background: linear-gradient(180deg, var(--card) 0%, var(--card-soft) 100%);
    border: 1px solid var(--accent-glow);
    border-radius: var(--radius);
    padding: 2rem 2.2rem 2.1rem;
}
.research-final-body {
    color: var(--text-soft);
    font-size: 0.96rem;
    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 1.4rem;
    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: all .25s 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 -10px var(--accent-glow);
}
.research-final-sub {
    margin: 1.3rem 0 0;
    font-size: 0.84rem;
    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, var(--accent)); }

/* ─── Research-map (interactive concept graph) ──────────────────
   Force-directed SVG of top-level concepts + topics from OpenAlex.
   Server-baked static layout (works without JS for SEO + a11y);
   research-map.js runs a spring simulation on top for the settling
   motion + hover/drag. */
.research-map {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem 2.2rem 1.4rem;
    margin: 1.5rem 0 0;
    position: relative;
    overflow: hidden;
}
.research-map::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(60% 70% at 20% 20%, rgba(255,184,77,0.07), transparent 60%),
        radial-gradient(50% 60% at 80% 80%, rgba(120,200,180,0.05), 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: 0.95rem;
    line-height: 1.65;
    max-width: 720px;
    margin: 0.7rem 0 1.2rem;
}
.research-map-canvas {
    position: relative;
    z-index: 1;
    width: 100%;
    aspect-ratio: 1000 / 560;
    border-radius: 14px;
    background: linear-gradient(180deg,
        rgba(0,0,0,0.18) 0%,
        rgba(0,0,0,0.05) 100%);
    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: rgba(255,184,77,0.30);
    stroke-linecap: round;
    transition: stroke .2s, stroke-width .2s, opacity .2s;
}
.rm-edge--focus {
    stroke: var(--accent);
    stroke-width: 1.8 !important;
    opacity: 1;
}
.rm-edge--dim { opacity: 0.18; }

/* Nodes */
.rm-node {
    cursor: pointer;
    transition: opacity .25s var(--ease);
}
.rm-node--dim { opacity: 0.35; }
.rm-node--focus .rm-node-disc {
    filter: drop-shadow(0 0 14px var(--accent-glow));
}
.rm-node--dragging { cursor: grabbing; }

.rm-node-disc {
    fill: var(--card-soft, #1a2622);
    stroke: var(--border, rgba(255,184,77,0.22));
    stroke-width: 1.4;
    transition: fill .2s, stroke .2s;
}
.rm-node-label {
    fill: var(--text);
    font-family: var(--body);
    font-size: 11.5px;
    font-weight: 500;
    letter-spacing: 0.1px;
    pointer-events: none;
}

.rm-node--center .rm-node-disc {
    fill: var(--accent);
    stroke: var(--accent);
}
.rm-node--center .rm-node-label {
    fill: var(--bg, #0d1411);
    font-size: 12.5px;
    font-weight: 700;
}
.rm-node--concept .rm-node-disc {
    fill: rgba(255,184,77,0.14);
    stroke: rgba(255,184,77,0.55);
}
.rm-node--concept .rm-node-label {
    font-size: 12px;
    font-weight: 600;
    fill: var(--accent);
}
.rm-node--topic .rm-node-disc {
    fill: rgba(120,200,180,0.10);
    stroke: rgba(120,200,180,0.50);
}
.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: rgba(255,184,77,0.28);
}
.rm-node--focus.rm-node--topic .rm-node-disc {
    fill: rgba(120,200,180,0.22);
}

/* ─── Responsive ───────────────────────────────────────────────── */
@media (max-width: 640px) {
    .research-block { padding: 1.5rem 1.6rem; }
    .research-intro { padding: 1.3rem 1.5rem; }
    .research-final { padding: 1.5rem 1.6rem; }
    .research-map   { padding: 1.4rem 1.4rem 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; }
}