:root {
    --bg: #0a1628;
    --bg-alt: #0e1e36;
    --card-bg: #12233f;
    --card-bg-alt: #16294a;
    --border: #1e3a5f;
    --text: #e8eef5;
    --text-dim: #9fb3c8;
    --accent: #2dd4bf;
    --accent-2: #38bdf8;
    --warn: #fbbf24;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Elms Sans", system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
}

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

.nr-top-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(10, 22, 40, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    padding: 0.9rem 1.5rem;
}

.nr-top-nav a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
}

.nr-top-nav a:hover {
    color: var(--accent);
}

.nr-hero {
    max-width: 900px;
    margin: 0 auto;
    padding: 5rem 1.5rem 3rem;
    text-align: center;
}

.nr-hero .nr-eyebrow {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

.nr-hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    background: linear-gradient(90deg, #e8eef5, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nr-hero .nr-subtitle {
    font-size: 1.15rem;
    color: var(--text-dim);
    margin-bottom: 1.25rem;
}

.nr-hero .nr-meta {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.nr-hero .nr-pitch {
    font-size: 1.15rem;
    color: var(--text);
    max-width: 700px;
    margin: 0 auto;
}

.nr-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 3.5rem 1.5rem;
}

.nr-section.nr-wide {
    max-width: 1100px;
}

.nr-section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text);
}

.nr-section h2 .nr-h2-accent {
    color: var(--accent);
}

.nr-section p {
    color: var(--text-dim);
    margin-bottom: 1rem;
}

.nr-section p strong {
    color: var(--text);
}

/* ---------- Reveal on scroll ---------- */

.nr-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.nr-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Pipeline diagram ---------- */

.nr-pipeline {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.nr-stage {
    display: flex;
    gap: 1.5rem;
    position: relative;
    padding-bottom: 2.5rem;
}

.nr-stage:last-child {
    padding-bottom: 0;
}

.nr-stage-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
}

.nr-stage-number {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--card-bg-alt);
    border: 2px solid var(--accent);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.nr-stage-line {
    flex: 1;
    width: 2px;
    background: var(--border);
    margin: 0.25rem 0;
}

.nr-stage-body {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem 1.75rem;
    flex: 1;
}

.nr-stage-body h3 {
    color: var(--text);
    font-size: 1.15rem;
    margin-bottom: 0.6rem;
}

.nr-stage-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--accent-2);
    margin-bottom: 0.5rem;
}

.nr-stage-body ul {
    margin-left: 1.1rem;
    color: var(--text-dim);
    font-size: 0.92rem;
}

.nr-stage-body li {
    margin-bottom: 0.35rem;
}

/* ---------- Stat cards ---------- */

.nr-stat-group-title {
    color: var(--text);
    font-weight: 700;
    font-size: 1.05rem;
    margin: 1.5rem 0 1rem;
}

.nr-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.nr-stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
}

.nr-stat-value {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
}

.nr-stat-value.nr-stat-neutral {
    color: var(--accent-2);
}

.nr-stat-label {
    color: var(--text-dim);
    font-size: 0.8rem;
    margin-top: 0.4rem;
}

.nr-stat-note {
    background: var(--bg-alt);
    border-left: 3px solid var(--accent-2);
    padding: 0.85rem 1.1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
}

.nr-stat-note strong {
    color: var(--text);
}

/* ---------- Contributions ---------- */

.nr-contrib-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.nr-contrib-card {
    background: var(--card-bg-alt);
    border: 1px solid var(--accent);
    border-radius: 12px;
    padding: 1.5rem;
}

.nr-contrib-card .nr-contrib-num {
    color: var(--accent);
    font-weight: 800;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.nr-contrib-card h3 {
    color: var(--text);
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.nr-contrib-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* ---------- Limitations ---------- */

.nr-limitations {
    background: var(--card-bg);
    border: 1px solid var(--warn);
    border-radius: 12px;
    padding: 1.75rem;
}

.nr-limitations h2 {
    color: var(--warn);
}

.nr-limitations ul {
    margin-left: 1.25rem;
    color: var(--text-dim);
}

.nr-limitations li {
    margin-bottom: 0.5rem;
}

/* ---------- Tech badges ---------- */

.nr-tech-group {
    margin-bottom: 1.25rem;
}

.nr-tech-group-label {
    color: var(--text-dim);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.6rem;
}

.nr-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.nr-badge {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--accent-2);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
}

/* ---------- Key papers ---------- */

.nr-papers {
    list-style: none;
    margin-left: 0;
}

.nr-papers li {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.92rem;
}

.nr-papers li:last-child {
    border-bottom: none;
}

/* ---------- Vision statement ---------- */

.nr-vision {
    background: linear-gradient(135deg, var(--bg-alt), var(--card-bg-alt));
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 4rem 1.5rem;
    text-align: center;
}

.nr-vision-inner {
    max-width: 720px;
    margin: 0 auto;
}

.nr-vision p {
    font-size: 1.15rem;
    color: var(--text);
    margin-bottom: 1.25rem;
}

.nr-vision p:last-child {
    color: var(--accent);
    font-weight: 600;
}

.nr-footer {
    text-align: center;
    padding: 2.5rem 1.5rem;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.nr-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

@media (max-width: 600px) {
    .nr-stage {
        gap: 1rem;
    }
    .nr-stage-body {
        padding: 1.15rem 1.25rem;
    }
}