/* ==========================================
   Publications & Projects Page
   Light/Dark Theme Support
   ========================================== */

/* Page Hero */
.page-hero {
    padding-top: calc(var(--header-height) + var(--spacing-2xl));
    padding-bottom: var(--spacing-xl);
    background:
        radial-gradient(
            ellipse 80% 50% at 50% 0%,
            var(--hero-gradient-1),
            transparent
        ),
        var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
}

.page-hero h1 {
    font-family: var(--font-display);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.page-subtitle {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Filter Bar */
.filter-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    background-color: transparent;
    border: 1px solid var(--border-visible);
    border-radius: 100px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.filter-btn.active {
    color: #ffffff;
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* Publications Grid Section */
.publications-grid-section {
    padding: var(--spacing-2xl) 0 var(--spacing-3xl);
    background-color: var(--bg-primary);
}

/* Publication Flow - The main container for the magazine layout */
.pub-flow {
    max-width: 900px;
    margin: 0 auto;
}

/* Year Markers */
.year-marker {
    clear: both;
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-visible);
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--spacing-sm);
    transition: opacity var(--transition-base);
}

.year-marker:hover {
    opacity: 0.8;
}

.year-marker .collapse-icon {
    width: 24px;
    height: 24px;
    color: var(--text-tertiary);
    transition: transform var(--transition-base);
}

.year-marker.collapsed .collapse-icon {
    transform: rotate(-90deg);
}

/* Year Section Content */
.year-section-content {
    overflow: hidden;
    transition:
        max-height 0.4s ease-out,
        opacity 0.3s ease-out;
    max-height: 5000px;
    opacity: 1;
}

.year-section-content.collapsed {
    max-height: 0;
    opacity: 0;
    margin-bottom: 0;
}

/* ==========================================
   2024 Section Grid Layout
   ========================================== */

.year-2024-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    clear: both;
}

.year-2024-grid .featured-card {
    grid-column: 1;
    grid-row: 1 / 3;
    width: 100%;
    float: none;
    margin: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.year-2024-grid .featured-card-inner {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.year-2024-grid .featured-card .pub-abstract {
    flex: 1;
}

.year-2024-grid .pub-row {
    grid-column: 2;
    grid-row: 1;
    margin: 0;
}

.year-2024-grid .article-card {
    grid-column: 2;
    grid-row: 2;
    width: 100%;
    float: none;
    margin: 0;
    display: flex;
    flex-direction: column;
}

.year-2024-grid .article-card-inner {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.year-2024-grid .article-card .pub-abstract {
    flex: 1;
}

@media (max-width: 900px) {
    .year-2024-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }

    .year-2024-grid .featured-card {
        grid-column: 1;
        grid-row: 1;
    }

    .year-2024-grid .pub-row {
        grid-column: 1;
        grid-row: 2;
    }

    .year-2024-grid .article-card {
        grid-column: 1;
        grid-row: 3;
    }
}

/* ==========================================
   2025 Section - Two Column Article Grid
   ========================================== */

.year-2025-flow {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    clear: both;
}

.year-2025-flow .article-card {
    width: 100%;
    float: none;
    margin: 0;
}

@media (max-width: 768px) {
    .year-2025-flow {
        grid-template-columns: 1fr;
    }
}

.year-marker span {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--accent-primary);
    letter-spacing: 0.02em;
}

/* Base Publication Item */
.pub-item {
    margin-bottom: var(--spacing-md);
}

.pub-item.hidden {
    display: none;
}

/* Publication Title */
.pub-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    line-height: 1.4;
    transition: color var(--transition-fast);
}

/* Publication Venue */
.pub-venue {
    font-size: 0.9rem;
    color: var(--accent-primary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

/* Publication Authors */
.pub-authors {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-bottom: 0;
}

/* ==========================================
   Publication Row - Horizontal compact style
   ========================================== */

.pub-row {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition:
        box-shadow var(--transition-base),
        border-color var(--transition-base);
}

.pub-row:hover {
    border-color: var(--border-accent);
    box-shadow: var(--card-shadow-hover);
}

.pub-row-main {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
}

.pub-row-content {
    flex: 1;
    min-width: 0;
}

.pub-row-actions {
    flex-shrink: 0;
}

.expand-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-hover);
    border: 1px solid var(--border-subtle);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.expand-btn:hover {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #ffffff;
}

.expand-btn svg {
    transition: transform var(--transition-fast);
}

.pub-row.expanded .expand-btn svg {
    transform: rotate(180deg);
}

/* Expanded content */
.pub-row-expanded {
    display: none;
    padding: 0 var(--spacing-md) var(--spacing-md);
    border-top: 1px solid var(--border-subtle);
    background-color: var(--bg-hover);
}

.pub-row.expanded .pub-row-expanded {
    display: block;
}

.pub-row-expanded .pub-abstract {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
}

.pub-row-expanded .pub-abstract strong {
    color: var(--text-primary);
}

/* Publication Links */
.pub-links {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.pub-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.875rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-visible);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.pub-link:hover {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #ffffff;
}

.pub-link.disabled {
    color: var(--text-tertiary);
    cursor: not-allowed;
    opacity: 0.5;
}

.pub-link.disabled:hover {
    background-color: var(--bg-elevated);
    border-color: var(--border-visible);
    color: var(--text-tertiary);
}

/* ==========================================
   Featured Cards - Square, prominent style
   ========================================== */

.featured-card {
    width: 340px;
    background: linear-gradient(
        135deg,
        var(--bg-hover) 0%,
        var(--bg-elevated) 100%
    );
    border: 1px solid var(--border-visible);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition:
        transform var(--transition-base),
        box-shadow var(--transition-base),
        border-color var(--transition-base);
    position: relative;
}

.featured-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(
        90deg,
        var(--accent-primary) 0%,
        transparent 100%
    );
}

.featured-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-accent);
    box-shadow: var(--card-shadow-hover);
}

/* Float positioning for featured cards */
.featured-card.float-right {
    float: right;
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.featured-card.float-left {
    float: left;
    margin-right: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

/* Default: no float, inline-block behavior */
.featured-card:not(.float-right):not(.float-left) {
    float: left;
    margin-right: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.featured-card-inner {
    padding: var(--spacing-lg);
}

.featured-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #ffffff;
    background-color: var(--accent-primary);
    border-radius: 100px;
    margin-bottom: var(--spacing-sm);
}

.featured-card .pub-title {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.featured-card .pub-venue {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.featured-card .pub-abstract {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

/* Featured Links */
.featured-links {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.featured-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.875rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-visible);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.featured-link:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.featured-link.primary {
    background-color: var(--accent-primary);
    color: #ffffff;
    border-color: var(--accent-primary);
}

.featured-link.primary:hover {
    background-color: var(--accent-hover);
    box-shadow: var(--shadow-glow);
}

/* Tech Tags */
.tech-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tech-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
}

/* ==========================================
   Article Cards - Medium, blog-style
   ========================================== */

.article-card {
    width: 300px;
    float: right;
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition:
        box-shadow var(--transition-base),
        transform var(--transition-base),
        border-color var(--transition-base);
}

.article-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-2px);
    box-shadow: var(--card-shadow-hover);
}

.article-card-inner {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.article-card-image {
    width: calc(100% + 2 * var(--spacing-md));
    height: 160px;
    object-fit: cover;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    margin: calc(-1 * var(--spacing-md));
    margin-bottom: var(--spacing-md);
}

.year-2025-flow .article-card-image {
    height: 180px;
}

/* Gradient placeholder backgrounds for articles without images */
.article-card-placeholder {
    width: calc(100% + 2 * var(--spacing-md));
    height: 140px;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    margin: calc(-1 * var(--spacing-md));
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.year-2025-flow .article-card-placeholder {
    height: 160px;
}

/* Different gradient styles for variety */
.article-card-placeholder.gradient-1 {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
}

.article-card-placeholder.gradient-2 {
    background: linear-gradient(135deg, #db2777 0%, #be185d 100%);
}

.article-card-placeholder.gradient-3 {
    background: linear-gradient(135deg, #0284c7 0%, #0891b2 100%);
}

.article-card-placeholder.gradient-4 {
    background: linear-gradient(135deg, #059669 0%, #0d9488 100%);
}

.article-card-placeholder.gradient-5 {
    background: linear-gradient(135deg, #d97706 0%, #ca8a04 100%);
}

/* Nostr-themed gradients */
.article-card-placeholder.gradient-nostr {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.article-card-placeholder.gradient-bitcoin {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.article-card-placeholder.gradient-tech {
    background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
}

/* Icon overlay on placeholder */
.article-card-placeholder::after {
    content: "";
    position: absolute;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.article-card-placeholder .placeholder-icon {
    color: rgba(255, 255, 255, 0.9);
    z-index: 1;
}

.article-source {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.article-source svg {
    color: var(--accent-primary);
}

.article-card .pub-title {
    font-size: 1.05rem;
    margin-bottom: var(--spacing-xs);
}

.article-card .pub-abstract {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.read-more-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.read-more-link:hover {
    color: var(--accent-hover);
}

/* ==========================================
   Clear float helper
   ========================================== */

.clear-flow {
    clear: both;
}

/* ==========================================
   Publications Footer
   ========================================== */

.publications-footer {
    clear: both;
    text-align: center;
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--border-subtle);
    margin-top: var(--spacing-xl);
}

.view-all-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.view-all-link:hover {
    color: var(--accent-hover);
}

/* ==========================================
   Toast Notification
   ========================================== */

.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.25rem;
    background-color: var(--accent-primary);
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 9999;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ==========================================
   Active nav link styling
   ========================================== */

.nav-link.active {
    color: var(--accent-primary);
}

/* ==========================================
   Responsive Styles
   ========================================== */

@media (max-width: 900px) {
    .featured-card,
    .article-card {
        float: none;
        width: 100%;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }

    .featured-card.float-right,
    .featured-card.float-left,
    .featured-card:not(.float-right):not(.float-left) {
        float: none;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 768px) {
    .page-hero {
        padding-top: calc(var(--header-height) + var(--spacing-xl));
        padding-bottom: var(--spacing-lg);
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .filter-btn {
        padding: 0.4rem 1rem;
        font-size: 0.85rem;
    }

    .pub-row-main {
        padding: var(--spacing-sm);
    }

    .pub-title {
        font-size: 1rem;
    }

    .pub-venue,
    .pub-authors {
        font-size: 0.85rem;
    }

    .pub-row-expanded {
        padding: 0 var(--spacing-sm) var(--spacing-sm);
    }

    .expand-btn {
        width: 32px;
        height: 32px;
    }

    .featured-card-inner,
    .article-card-inner {
        padding: var(--spacing-md);
    }

    .featured-card .pub-title {
        font-size: 1.1rem;
    }

    .year-marker span {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .filter-bar {
        gap: 0.25rem;
    }

    .filter-btn {
        padding: 0.35rem 0.75rem;
        font-size: 0.8rem;
    }

    .pub-links {
        flex-direction: column;
    }

    .pub-link {
        width: 100%;
        justify-content: center;
    }

    .featured-links {
        flex-direction: column;
    }

    .featured-link {
        width: 100%;
        justify-content: center;
    }
}

/* ==========================================
   Print Styles
   ========================================== */

@media print {
    .filter-bar,
    .expand-btn,
    .toast,
    .theme-toggle {
        display: none;
    }

    .pub-row-expanded {
        display: block !important;
    }

    .featured-card,
    .article-card {
        float: none;
        width: 100%;
        break-inside: avoid;
    }

    .featured-card {
        background: none;
        border: 2px solid #333;
    }

    body {
        background: #fff;
        color: #000;
    }

    .featured-card .pub-title,
    .featured-card .pub-venue,
    .featured-card .pub-abstract {
        color: #000;
    }
}

/* ==========================================
   Additional Visual Enhancements
   ========================================== */

/* Better hover states for pub rows */
.pub-row:hover .pub-title {
    color: var(--accent-primary);
}

/* Citation button success state */
.cite-btn.copied,
.cite-btn-featured.copied {
    background-color: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
    color: #ffffff !important;
}

/* Improved spacing between float cards and text */
.pub-row {
    clear: none;
}

/* Two-column layout hint for certain viewport sizes */
@media (min-width: 1100px) {
    .pub-flow {
        max-width: 1000px;
    }

    .featured-card {
        width: 380px;
    }

    .article-card {
        width: 340px;
    }
}

/* Focus states for accessibility */
.expand-btn:focus,
.filter-btn:focus,
.pub-link:focus,
.featured-link:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .featured-card,
    .article-card,
    .pub-row {
        transition: none;
    }
}