/* ===== RESEARCH PAPERS PAGE — Light Editorial Design System ===== */

.gothic-research-wrapper {
    background-color: var(--bg, #F5F3F0);
    color: var(--text, #1A1A1A);
    min-height: 100vh;
    padding-top: 140px;
    padding-bottom: 90px;
}

.research-main-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 clamp(20px, 4vw, 40px);
}

/* HERO SECTION */
.research-paper-hero {
    position: relative;
    padding: 100px 0 70px;
    border-bottom: 1px solid var(--border, #E0DCD8);
    margin-bottom: 70px;
    overflow: hidden;
    min-height: 380px;
    display: flex;
    align-items: center;
    border-radius: var(--radius, 4px);
}

.research-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.research-hero-bg .hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.research-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to right,
        rgba(245, 243, 240, 0.94) 0%,
        rgba(245, 243, 240, 0.88) 50%,
        rgba(245, 243, 240, 0.65) 100%
    );
}

.hero-content-col {
    position: relative;
    z-index: 1;
    max-width: 680px;
    padding: 0 20px;
}

.paper-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-m, 'DM Sans', sans-serif);
    font-size: 0.72rem;
    color: var(--accent-warm, #C4956A);
    letter-spacing: 0.2em;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.paper-main-title {
    font-family: var(--font-h, 'Playfair Display', Georgia, serif);
    font-size: clamp(2.6rem, 5.5vw, 4.2rem);
    font-weight: 700;
    color: var(--text, #1A1A1A);
    line-height: 1.12;
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

.text-accent-glow {
    color: var(--accent-warm, #C4956A);
    font-style: italic;
    font-weight: 700;
    text-shadow: none;
}

.paper-main-subtitle {
    font-family: var(--font-b, 'DM Sans', sans-serif);
    font-size: 1.08rem;
    color: var(--text-secondary, #555555);
    line-height: 1.7;
    margin-bottom: 28px;
    max-width: 640px;
}

.paper-tags-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.paper-tag-pill {
    font-family: var(--font-m, 'DM Sans', sans-serif);
    font-size: 0.72rem;
    color: var(--text, #1A1A1A);
    background: var(--bg-white, #FFFFFF);
    border: 1px solid var(--border, #E0DCD8);
    padding: 6px 14px;
    border-radius: var(--radius, 4px);
    font-weight: 500;
    letter-spacing: 0.05em;
    transition: all 0.2s var(--ease, cubic-bezier(0.16, 1, 0.3, 1));
}

.paper-tag-pill:hover {
    border-color: var(--accent-warm, #C4956A);
    color: var(--accent-warm, #C4956A);
    transform: translateY(-1px);
}

.hero-right-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ring-visual-glow {
    position: absolute;
    width: 85%;
    height: 85%;
    background: rgba(196, 149, 106, 0.12);
    filter: blur(40px);
    border-radius: 50%;
    z-index: 1;
}

.ring-visual-img {
    width: 100%;
    max-width: 400px;
    height: 380px;
    object-fit: cover;
    border-radius: var(--radius, 4px);
    border: 1px solid var(--border, #E0DCD8);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    position: relative;
    z-index: 2;
    transition: transform 0.4s var(--ease, cubic-bezier(0.16, 1, 0.3, 1));
}

.hero-right-visual:hover .ring-visual-img {
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

/* SECTION HEADER */
.section-gothic-header {
    margin-bottom: 45px;
}

.section-gothic-title {
    font-family: var(--font-h, 'Playfair Display', Georgia, serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text, #1A1A1A);
    margin-bottom: 12px;
}

.section-divider {
    height: 2px;
    width: 60px;
    background: var(--accent-warm, #C4956A);
    margin-bottom: 16px;
}

.section-text {
    color: var(--text-secondary, #555555);
    font-size: 1rem;
    font-family: var(--font-b, 'DM Sans', sans-serif);
    line-height: 1.63;
}

/* CARDS GRID */
.gothic-paper-cards-grid {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.gothic-paper-card {
    background: var(--bg-white, #FFFFFF);
    border: 1px solid var(--border, #E0DCD8);
    border-radius: var(--radius, 4px);
    padding: 40px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s var(--ease, cubic-bezier(0.16, 1, 0.3, 1)),
                box-shadow 0.3s var(--ease, cubic-bezier(0.16, 1, 0.3, 1)),
                border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.gothic-paper-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
    border-color: var(--accent-warm, #C4956A);
}

.paper-card-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 22px;
}

.paper-card-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: var(--radius, 4px);
    background: var(--bg-section, #EDEAE6);
    border: 1px solid var(--border, #E0DCD8);
    color: var(--text, #1A1A1A);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
}

/* BADGES */
.flagship-badge,
.preprint-badge,
.published-badge {
    font-family: var(--font-m, 'DM Sans', sans-serif);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: var(--radius, 4px);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.flagship-badge {
    background: var(--accent, #1A1A1A);
    color: #FFFFFF;
    border: 1px solid var(--accent, #1A1A1A);
}

.preprint-badge {
    background: var(--bg-section, #EDEAE6);
    color: var(--text-secondary, #555555);
    border: 1px solid var(--border, #E0DCD8);
}

.published-badge {
    background: rgba(196, 149, 106, 0.12);
    color: #8C5E35;
    border: 1px solid var(--accent-warm, #C4956A);
}

/* CARD DETAILS */
.paper-card-item-title {
    font-family: var(--font-h, 'Playfair Display', Georgia, serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text, #1A1A1A);
    margin-bottom: 10px;
    line-height: 1.28;
}

.paper-card-author-line {
    font-family: var(--font-m, 'DM Sans', sans-serif);
    font-size: 0.85rem;
    color: var(--accent-warm, #C4956A);
    font-weight: 500;
    margin-bottom: 18px;
    letter-spacing: 0.02em;
}

.paper-card-abstract-text {
    color: var(--text-secondary, #555555);
    font-family: var(--font-b, 'DM Sans', sans-serif);
    font-size: 0.98rem;
    line-height: 1.7;
    margin-bottom: 24px;
    max-width: 920px;
}

.paper-card-tags-flex {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.kw-pill {
    font-family: var(--font-m, 'DM Sans', sans-serif);
    font-size: 0.72rem;
    color: var(--text-secondary, #555555);
    background: var(--bg, #F5F3F0);
    border: 1px solid var(--border, #E0DCD8);
    padding: 5px 12px;
    border-radius: var(--radius, 4px);
    font-weight: 500;
}

/* ACTIONS */
.paper-card-actions-row {
    display: flex;
    gap: 14px;
    align-items: center;
}

.card-btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent, #1A1A1A);
    color: #FFFFFF !important;
    border: 1px solid var(--accent, #1A1A1A);
    padding: 11px 24px;
    border-radius: var(--radius, 4px);
    font-family: var(--font-b, 'DM Sans', sans-serif);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    transition: all 0.25s var(--ease, cubic-bezier(0.16, 1, 0.3, 1));
    text-decoration: none;
}

.card-btn-download:hover {
    background: #333333;
    border-color: #333333;
    color: #FFFFFF !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.card-btn-cite {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text, #1A1A1A);
    border: 1px solid var(--text, #1A1A1A);
    padding: 11px 24px;
    border-radius: var(--radius, 4px);
    font-family: var(--font-b, 'DM Sans', sans-serif);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    cursor: pointer;
    transition: all 0.25s var(--ease, cubic-bezier(0.16, 1, 0.3, 1));
}

.card-btn-cite:hover {
    background: var(--text, #1A1A1A);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

/* RESPONSIVE MEDIA QUERIES */
@media (max-width: 1024px) {
    .research-paper-hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .paper-main-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .paper-tags-row {
        justify-content: center;
    }

    .hero-right-visual {
        margin-top: 10px;
    }

    .ring-visual-img {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .gothic-research-wrapper {
        padding-top: 110px;
        padding-bottom: 60px;
    }

    .gothic-paper-card {
        padding: 30px;
    }

    .paper-card-item-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 600px) {
    .gothic-paper-card {
        padding: 24px;
    }

    .paper-card-actions-row {
        flex-direction: column;
        width: 100%;
        gap: 10px;
    }

    .card-btn-download,
    .card-btn-cite {
        width: 100%;
        justify-content: center;
    }
}