/* ═══════════════════════════════════════════════════ */
/* RESEARCH LANDING PAGE                               */
/* ═══════════════════════════════════════════════════ */

/* ── HERO ── */
.research-hero {
    padding: 160px 32px 80px;
    text-align: center;
    position: relative;
}

.research-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, .06) 0%, transparent 70%);
    pointer-events: none;
}

.research-label {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2.5px;
    color: var(--adjudicator);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.research-label::before {
    content: '';
    display: block;
    width: 24px;
    height: 1px;
    background: var(--adjudicator);
}

.research-label::after {
    content: '';
    display: block;
    width: 24px;
    height: 1px;
    background: var(--adjudicator);
}

.research-title {
    font-family: var(--serif);
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.research-title em {
    font-style: italic;
    color: var(--adjudicator);
}

.research-subtitle {
    font-size: 1.15rem;
    color: var(--text2);
    line-height: 1.75;
    max-width: 640px;
    margin: 0 auto;
    font-weight: 400;
}

/* ── SERIES CONNECTOR ── */
.series-connector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin: 40px auto 60px;
    max-width: 400px;
}

.series-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--adjudicator);
    opacity: 0.6;
}

.series-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--adjudicator), var(--gate));
    opacity: 0.3;
}

/* ── PAPER CARDS ── */
.papers-grid {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 32px 120px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.paper-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px 32px 32px;
    position: relative;
    overflow: hidden;
    transition: border-color .3s, transform .3s, box-shadow .3s;
    display: flex;
    flex-direction: column;
}

.paper-card:hover {
    border-color: var(--border2);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, .3);
}

.paper-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
}

.paper-card:nth-child(1)::before {
    background: linear-gradient(90deg, var(--planner), var(--gold));
}

.paper-card:nth-child(2)::before {
    background: linear-gradient(90deg, var(--adjudicator), var(--gate));
}

.paper-card:nth-child(3)::before {
    background: linear-gradient(90deg, var(--approved), var(--gate));
}

.paper-number {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 20px;
    display: inline-block;
    padding: 4px 12px;
    border-radius: 6px;
}

.paper-card:nth-child(1) .paper-number {
    color: var(--planner);
    background: rgba(240, 136, 62, .1);
    border: 1px solid rgba(240, 136, 62, .2);
}

.paper-card:nth-child(2) .paper-number {
    color: var(--adjudicator);
    background: rgba(139, 92, 246, .1);
    border: 1px solid rgba(139, 92, 246, .2);
}

.paper-card:nth-child(3) .paper-number {
    color: var(--approved);
    background: rgba(63, 185, 80, .1);
    border: 1px solid rgba(63, 185, 80, .2);
}

.paper-card h2 {
    font-family: var(--serif);
    font-size: 1.5rem;
    line-height: 1.25;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.paper-card .paper-subtitle {
    font-size: 0.95rem;
    color: var(--text2);
    line-height: 1.6;
    margin-bottom: 24px;
    flex: 1;
}

.paper-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.paper-reading-time {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text3);
    letter-spacing: 0.5px;
}

.paper-link {
    margin-left: auto;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    transition: color .2s, transform .2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.paper-link:hover {
    color: var(--adjudicator);
    transform: translateX(3px);
}

.paper-link .arrow {
    transition: transform .2s;
}

.paper-link:hover .arrow {
    transform: translateX(4px);
}

/* ── READING ORDER ── */
.reading-order {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 32px 120px;
    text-align: center;
}

.reading-order-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 32px;
}

.reading-order h3 {
    font-family: var(--sans);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text2);
}

.reading-order p {
    font-size: 0.9rem;
    color: var(--text3);
    line-height: 1.6;
}

.reading-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.reading-step {
    font-family: var(--mono);
    font-size: 11px;
    padding: 6px 14px;
    border-radius: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text2);
}

.reading-arrow {
    color: var(--text3);
    font-size: 14px;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
    .papers-grid {
        grid-template-columns: 1fr;
    }
}