/* =====================================================================
   ACADEMIC ASSISTANT DETAIL MODAL & CROSSREF METADATA
   ===================================================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 10050;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 1.5rem;
}

.modal-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-card);
    width: 100%;
    max-width: 680px;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    transform: translateY(24px) scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.show .modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.25rem;
    background: transparent;
}

.modal-title-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.modal-title-wrapper h3 {
    font-family: var(--font-display);
    font-size: 1.28rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.45;
}

.modal-title-badge {
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-pill);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    align-self: flex-start;
    font-family: var(--font-body);
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.35rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    padding: 0.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close-btn:hover {
    color: var(--text-primary);
    transform: scale(1.15);
}

.modal-body {
    padding: 1.6rem;
    overflow-y: auto;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.modal-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.modal-section-title {
    font-family: var(--font-body);
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 0.5rem;
}

.modal-section-title i {
    font-size: 1.05rem;
}

/* =====================================================================
   CROSSREF PUBLICATION BOX STYLING
   ===================================================================== */
.publication-details-box {
    background: var(--bg-color);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-card);
    padding: 1.1rem;
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Pub Loading */
.pub-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.spinner-small {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(0, 0, 0, 0.03);
    border-top: 2px solid var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

/* Pub Info Grid */
.pub-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem 1.25rem;
}

@media (max-width: 576px) {
    .pub-info-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
}

.pub-info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.pub-info-item.full-width {
    grid-column: 1 / -1;
}

.pub-info-label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.pub-info-label i {
    color: var(--text-secondary);
}

.pub-info-val {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 550;
    line-height: 1.4;
}

/* Large DOI Button */
.btn-doi-large {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-btn);
    font-weight: 500;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.88rem;
    transition: var(--transition-smooth);
    text-align: center;
    margin-top: 0.25rem;
}

.btn-doi-large:hover {
    background: rgba(99, 102, 241, 0.08);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

/* Empty & Error Crossref */
.pub-empty {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.pub-empty i {
    color: var(--text-secondary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.pub-error {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--danger-color);
    font-size: 0.88rem;
}

.pub-error i {
    font-size: 1.1rem;
    flex-shrink: 0;
}

/* =====================================================================
   MODAL INTERNALS (TIMELINE, RESEARCH QUESTIONS)
   ===================================================================== */
.research-q-list {
    padding-left: 1.35rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.research-q-list li {
    font-size: 0.92rem;
    color: var(--text-primary);
    line-height: 1.55;
}

/* Timeline steps */
.research-timeline {
    display: flex;
    flex-direction: column;
    gap: 0.95rem;
}

.timeline-step {
    display: flex;
    gap: 0.85rem;
    align-items: flex-start;
}

.step-num {
    width: 24px;
    height: 24px;
    background: var(--primary);
    color: #FFFFFF;
    border-radius: 50%;
    font-size: 0.78rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-content {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.step-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
}

.step-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

/* Tech pills */
.tech-pill-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.tech-pill {
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius-chip);
}

/* Modal Footer */
.modal-footer {
    padding: 1.25rem 1.6rem;
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: flex-end;
    gap: 0.85rem;
    background: transparent;
}

/* =====================================================================
   ABSTRACT & AI TL;DR BOX STYLING
   ===================================================================== */
.abstract-box {
    background: var(--bg-color);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-card);
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tldr-container {
    background: rgba(99, 102, 241, 0.04);
    border-left: 3px solid var(--primary);
    padding: 0.75rem 1rem;
    border-radius: 0 8px 8px 0;
}

.tldr-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 0.45rem;
    letter-spacing: 0.03em;
}

#modalTldrText {
    font-size: 0.88rem;
    line-height: 1.5;
    color: var(--text-primary);
    font-style: italic;
}

.abstract-details {
    border-top: 1px solid var(--card-border);
    padding-top: 0.75rem;
}

.abstract-details summary {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--primary);
    cursor: pointer;
    user-select: none;
    outline: none;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.abstract-details summary:hover {
    color: var(--primary-hover);
}