/* research.css - enhanced styles for research pages */
:root {
    --research-primary: #ed7618;
    --research-primary-rgb: 237, 118, 24;
    --research-accent: #764ba2;
    --research-bg: #ffffff;
    --research-text: #1a1a1a;
    --research-muted: #6b7280;
    --research-card-bg: #ffffff;
    --research-card-border: rgba(15, 23, 42, 0.08);
    --research-card-shadow: 0 14px 30px rgba(15, 23, 42, 0.08);
}

[data-theme="dark"] {
    --research-bg: #0f1117;
    --research-text: #f8f9fa;
    --research-muted: #9aa3b2;
    --research-card-bg: #1a1d27;
    --research-card-border: rgba(255, 255, 255, 0.08);
    --research-card-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.research-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 24px 80px;
    position: relative;
    color: var(--research-text);
}

.research-container::before {
    content: '';
    position: absolute;
    inset: -40px -24px auto;
    height: 200px;
    background:
        radial-gradient(60% 120% at 0% 0%, rgba(var(--research-primary-rgb), 0.08), transparent 62%),
        radial-gradient(60% 120% at 100% 0%, rgba(118, 75, 162, 0.06), transparent 68%);
    opacity: 0.5;
    z-index: 0;
    pointer-events: none;
}

.research-container > * {
    position: relative;
    z-index: 1;
}
.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.publication-card {
    background: var(--research-card-bg);
    border: 1px solid var(--research-card-border);
    padding: 24px;
    border-radius: 20px;
    box-shadow: var(--research-card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-decoration: none;
    color: var(--research-text);
    position: relative;
    overflow: hidden;
}

.publication-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--research-primary), var(--research-accent));
    opacity: 0.9;
}

.publication-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 50px rgba(15, 23, 42, 0.18);
    border-color: rgba(var(--research-primary-rgb), 0.3);
}
.publication-meta {
    font-size: 0.85rem;
    color: var(--research-muted);
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 4px;
    letter-spacing: 0.02em;
}
.reading-time {
    color: var(--research-muted);
}
.publication-title {
    margin: 0 0 6px;
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.35;
}
.publication-description {
    color: var(--research-muted);
    margin: 8px 0 4px;
    line-height: 1.6;
}
.publication-tags {
    margin: 10px 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.publication-tags .tag {
    display: inline-flex;
    align-items: center;
    background: rgba(var(--research-primary-rgb), 0.12);
    color: var(--research-primary);
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: transform 0.2s ease, background 0.2s ease;
}

.publication-tags .tag:hover {
    transform: translateY(-2px);
    background: rgba(var(--research-primary-rgb), 0.2);
}
.publication-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 12px;
    font-size: 0.9rem;
    color: var(--research-muted);
    border-top: 1px solid rgba(15, 23, 42, 0.06);
}
.publication-container {
    max-width: 780px;
    margin: 0 auto;
    padding: 32px 24px 64px;
    background: transparent;
    color: var(--research-text);
}
.publication-content {
    line-height: 1.7;
    color: var(--research-text);
    background-color: transparent;
}
.related-publications {
    margin-top: 48px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.related-card {
    border: 1px solid var(--research-card-border);
    padding: 16px;
    border-radius: 14px;
    background: var(--research-card-bg);
    color: var(--research-text);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}
.clickable-card:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(var(--research-primary-rgb), 0.25);
}

.publication-content pre,
.publication-content code {
    background-color: var(--color-code-bg);
    color: var(--color-code-text);
    padding: 0.75rem;
    border-radius: 10px;
    overflow: auto;
}
.publication-card a,
.publication-content a {
    color: var(--research-primary);
    text-decoration: none;
}

.publication-card a:hover,
.publication-content a:hover {
    text-decoration: underline;
}
.publication-card .author {
    color: var(--research-muted);
}

.read-more {
    font-weight: 700;
    color: var(--research-primary);
}

.no-publications {
    text-align: center;
    background: var(--research-card-bg);
    border: 1px solid var(--research-card-border);
    border-radius: 24px;
    padding: 48px 24px;
    box-shadow: var(--research-card-shadow);
}

.no-publications h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.no-publications p {
    color: var(--research-muted);
    font-size: 1rem;
}

@media (max-width: 768px) {
    .research-container {
        padding: 32px 18px 60px;
    }

    .publication-card {
        padding: 20px;
    }

    .publication-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}