/* ===========================================
   Research Page Styles
   =========================================== */

/* Poster section layout */
.col-1-5 {
    width: 20%;
    float: left;
    padding: 0 var(--space-4);
    box-sizing: border-box;
    margin-bottom: var(--space-6);
}

.poster-box {
    position: relative;
    margin-bottom: var(--space-6);
}

.poster-content {
    padding: var(--space-4);
    position: relative;
    background: var(--color-bg-light);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.poster-content h4 {
    font-size: 0.9em;
    line-height: 1.3;
    margin: 0;
    padding-right: var(--space-5);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 2.6em;
}

.poster-content .info-icon {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    transform: none;
}

.poster-content .info-icon:hover {
    color: var(--color-primary);
}

.image.featured {
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    overflow: hidden;
    background: var(--color-bg-white);
    position: relative;
}

.image.featured img {
    transition: transform var(--transition-base);
}

.box:hover .image.featured img {
    transform: scale(1.05);
}

.box {
    background: var(--color-bg-white);
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    height: 100%;
}

.box:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--color-bg-white);
    margin: 10% auto;
    padding: var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    width: 80%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    color: #aaa;
    float: right;
    font-size: var(--font-size-3xl);
    font-weight: bold;
    cursor: pointer;
    transition: color var(--transition-base);
}

.close:hover,
.close:focus {
    color: var(--color-dark);
}

/* Responsive adjustments */
@media screen and (max-width: 1280px) {
    .col-1-5 {
        width: 25%;
    }
}

@media screen and (max-width: 980px) {
    .col-1-5 {
        width: 33.333%;
    }
}

@media screen and (max-width: 736px) {
    .col-1-5 {
        width: 50%;
    }
}

@media screen and (max-width: 480px) {
    .col-1-5 {
        width: 100%;
    }
}

/* Add these styles for expandable abstracts */
.abstract-container {
    position: relative;
    margin: var(--space-4) 0;
}

.abstract-text {
    display: block;
    margin-bottom: 0;
    line-height: 1.6;
    position: relative;
    overflow: hidden;
    max-height: 4.8em; /* 3 lines at 1.6em line height */
    transition: max-height var(--transition-base);
}

.abstract-text::after {
    content: "";
    position: absolute;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 25px;
    background: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,1));
    pointer-events: none;
}

.full-abstract {
    display: none;
}

.abstract-container.expanded .abstract-text {
    max-height: 1000px; /* Large enough to show all content */
}

.abstract-container.expanded .abstract-text::after {
    display: none;
}

.abstract-container.expanded .expand-button {
    margin-top: var(--space-4);
    background: var(--color-primary);
    color: var(--color-bg-white);
}

.abstract-container.expanded .expand-button:hover {
    background: var(--color-primary-hover);
}

.expand-button {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    cursor: pointer;
    padding: var(--space-1) var(--space-4);
    font-size: 0.9em;
    font-weight: 600;
    transition: all var(--transition-base);
    display: inline-block;
    margin-top: var(--space-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.expand-button:hover {
    color: var(--color-bg-white);
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(213, 35, 73, 0.2);
}

/* Info icon styling from news.html */
.info-icon {
    position: absolute;
    top: 50%;
    right: 0.8em;
    transform: translateY(-50%);
    color: var(--color-social-default);
    cursor: pointer;
    font-size: 0.85em;
    transition: color var(--transition-base);
}

.info-icon:hover {
    color: var(--color-primary);
}

/* ===========================================
   Paper Box Styles (consistent with site .box)
   =========================================== */

.paper-box {
    cursor: pointer;
}

.paper-box .image.featured {
    position: relative;
    margin: 0;
}

.paper-box .image.featured img {
    height: 200px;
    object-fit: contain;
    background: var(--color-bg-light);
}

/* Institution badge base styles */
.institution-badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Institution badge positioned on paper card image */
.paper-card-badges .institution-badge {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
}

.badge-microsoft {
    background: #00a4ef;
    color: white;
}

.badge-carnegie-mellon {
    background: #c41230;
    color: white;
}

.badge-university-of-florida {
    background: #0021a5;
    color: white;
}

/* Venue text */
.paper-venue {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--space-3);
    font-style: italic;
}

/* Paper link buttons (icon only) */
.paper-link-btn {
    width: var(--space-7) !important;
    height: var(--space-7) !important;
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: var(--font-size-lg) !important;
}

.paper-box footer ul.actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin: 0;
}

.paper-box footer ul.actions li {
    margin: 0;
}

/* Featured section spacing */
.featured-section {
    margin-bottom: var(--space-6);
}

/* ===========================================
   Paper Modal Styles
   =========================================== */

.paper-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.paper-modal-content {
    background-color: var(--color-bg-white);
    margin: 5% auto;
    padding: 0;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 700px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.paper-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-4);
}

.paper-modal-header h3 {
    margin: 0;
    font-size: var(--font-size-xl);
    line-height: 1.4;
    color: var(--color-heading);
}

.paper-modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--color-text-light);
    padding: 0;
    line-height: 1;
    transition: color var(--transition-fast);
    flex-shrink: 0;
}

.paper-modal-close:hover {
    color: var(--color-primary);
}

.paper-modal-body {
    padding: var(--space-6);
}

.paper-modal-meta {
    margin-bottom: var(--space-5);
}

.paper-modal-meta p {
    margin: var(--space-1) 0;
    font-size: var(--font-size-base);
}

.paper-modal-meta strong {
    color: var(--color-heading);
}

.paper-modal-abstract {
    margin-bottom: var(--space-5);
    line-height: 1.7;
    color: var(--color-text);
}

.paper-modal-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.paper-modal-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
}

.paper-modal-link.pdf {
    background: var(--color-primary);
    color: white;
}

.paper-modal-link.pdf:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
}

.paper-modal-link.code {
    background: var(--color-dark);
    color: white;
}

.paper-modal-link.code:hover {
    background: var(--color-dark-hover);
    transform: translateY(-2px);
}

.paper-modal-link.demo,
.paper-modal-link.blog {
    background: var(--color-bg-light);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.paper-modal-link.demo:hover,
.paper-modal-link.blog:hover {
    background: var(--color-bg-hover);
    transform: translateY(-2px);
}

/* BibTeX section */
.bibtex-container {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-4);
}

.bibtex-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
}

.bibtex-header h4 {
    margin: 0;
    font-size: var(--font-size-base);
}

.bibtex-toggle {
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    padding: var(--space-1) var(--space-3);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: white;
    transition: all var(--transition-fast);
}

.bibtex-toggle:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.bibtex-content {
    display: none;
    background: var(--color-bg-light);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    font-family: monospace;
    font-size: var(--font-size-sm);
    white-space: pre-wrap;
    word-break: break-word;
    overflow-x: auto;
    max-height: 200px;
}

.bibtex-content.show {
    display: block;
}

/* Responsive adjustments for modal */
@media screen and (max-width: 736px) {
    .paper-modal-content {
        margin: 10% auto;
        width: 95%;
    }

    .paper-modal-header,
    .paper-modal-body {
        padding: var(--space-4);
    }

    .paper-modal-links {
        flex-direction: column;
    }

    .paper-modal-link {
        justify-content: center;
    }
}

/* ===========================================
   Papers Grid Layout (New)
   =========================================== */

.papers-container {
    max-width: 1200px;
    margin: -2.5rem auto 0 auto;
    padding: 2rem 0;
}

.papers-container * {
    box-sizing: border-box;
}

/* Featured Section Headings */
.featured-section > h2,
.featured-section > h3,
.papers-container > h2,
.papers-container > h3 {
    font-size: 2rem;
    color: var(--color-heading);
    margin: 0 0 1.5rem 0;
    font-weight: 600;
}

/* Papers Grid - 3 columns */
.papers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}

/* Responsive - keep 3 columns down to mobile */
@media (max-width: 1024px) {
    .papers-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .papers-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-4);
    }
}

@media (max-width: 600px) {
    .papers-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-2);
    }

    .featured-section > h2,
    .featured-section > h3,
    .papers-container > h2,
    .papers-container > h3 {
        font-size: 1.3rem;
        margin: 0 0 1rem 0;
    }
}

/* Paper Grid Card */
.paper-grid-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition-base);
    cursor: pointer;
}

.paper-grid-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.paper-card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.paper-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.paper-grid-card:hover .paper-card-image img {
    transform: scale(1.05);
}

.paper-card-badges {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    right: var(--space-3);
}

/* Institution badges (grid cards) */
.paper-grid-card .institution-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.paper-card-content {
    padding: var(--space-4);
}

.paper-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-heading);
    margin: 0 0 var(--space-2) 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.paper-context {
    font-size: 0.85rem;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.paper-card-venue {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin: 0;
}

.paper-links {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    margin-top: var(--space-3);
}

/* Paper link buttons - icon circles */
.paper-grid-card .paper-link-btn {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    border-radius: var(--radius-full) !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: white !important;
    transition: transform 0.2s, opacity 0.2s;
    text-decoration: none !important;
    padding: 0 !important;
    border: none !important;
}

.paper-grid-card .paper-link-btn:hover {
    transform: scale(1.1);
    opacity: 0.9;
    color: white !important;
}

.paper-grid-card .paper-link-btn i {
    font-size: 1rem;
    line-height: 1;
}

.pdf-btn { background: #d32f2f !important; }
.code-btn { background: #333 !important; }
.demo-btn { background: #1976d2 !important; }
.blog-btn { background: #7b1fa2 !important; }
.arxiv-btn { background: #b31b1b !important; }

/* Mobile responsive for paper grid cards */
@media (max-width: 600px) {
    .paper-grid-card {
        border-radius: var(--radius-lg);
    }

    .paper-card-image {
        height: 70px;
    }

    .paper-card-badges .institution-badge {
        font-size: 0.45rem;
        padding: 0.15rem 0.35rem;
    }

    .paper-card-content {
        padding: var(--space-2);
    }

    .paper-card-title {
        font-size: 0.65rem;
        line-height: 1.25;
        margin-bottom: 0;
    }

    .paper-context,
    .paper-card-venue,
    .paper-links {
        display: none;
    }
}