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

/* Research Page Container */
.research-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* Section Titles */
.research-section {
    margin-bottom: var(--spacing-xl);
}

.research-section .section-header h2 {
    font-size: 2.2rem;
    font-weight: bold;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.research-section .section-header p {
    text-align: center;
    font-size: 1.1rem;
    color: var(--secondary-color);
}

/* Research Intro Section */
.research-intro {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background-color: var(--bg-light);
    position: relative;
    overflow: hidden;
}

.research-intro::before {
    content: "";
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background-color: rgba(220, 38, 38, 0.05);
    z-index: 0;
}

.research-intro .intro-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.7;
}

/* Research Areas Section */
.research-areas {
    padding: var(--spacing-xl) 0;
    position: relative;
}

/* Vertical Research Cards Layout - Full Width */
.research-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    width: 100%; /* Full width to match container */
    margin: 0 auto;
}

/* Individual Research Area - Vertical Layout */
.research-card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    width: 100%; /* Full width */
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    border-color: rgba(220, 38, 38, 0.3);
}

/* Research Card Header with Icon */
.research-card h3 {
    font-size: 1.8rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.research-card h3 i {
    color: var(--primary-color);
    font-size: 1.8rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(220, 38, 38, 0.1);
    border-radius: 50%;
}

.research-card h3::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 100px;
    height: 3px;
    background-color: var(--primary-color);
}

.research-card p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    width: 100%; /* Full width */
}

/* Vertical layout for research card content (Projects above Publications) */
.research-card-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    width: 100%;
}

/* Research Card Headings */
.research-card h4 {
    font-size: 1.2rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    font-weight: 600;
    position: relative;
    padding-left: 20px;
}

.research-card h4::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 10px;
    height: 10px;
    background-color: var(--primary-color);
    border-radius: 50%;
}

/* Publications Section - Separate from Key Projects */
.publications-block {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px dashed rgba(0, 0, 0, 0.1);
}

/* Research Projects List */
.research-card ul {
    padding-left: 5px;
    margin-bottom: var(--spacing-sm);
}

.research-card ul li {
    list-style: none;
    padding-left: 25px;
    position: relative;
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 10px;
    line-height: 1.5;
}

.research-card ul li::before {
    content: "\f105"; /* FontAwesome right arrow */
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1rem;
}

/* Publications List in Research Card */
.research-card .publications-list li {
    padding-left: 25px;
    font-size: 0.95rem;
    color: var(--secondary-color);
    border-left: 2px solid rgba(220, 38, 38, 0.2);
    padding-top: 3px;
    padding-bottom: 3px;
}

.research-card .publications-list li::before {
    content: "\f02d"; /* Book icon */
    left: 5px;
}

/* Research Methods Section */
.research-methods {
    background-color: var(--bg-light);
    padding: var(--spacing-xl) 0;
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.method-card {
    background: var(--bg-color);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
}

.method-card:hover {
    transform: translateY(-5px);
    border-color: rgba(220, 38, 38, 0.3);
}

.method-card .method-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(220, 38, 38, 0.1);
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
}

.method-card h3 {
    font-size: 1.3rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-xs);
}

.method-card p {
    font-size: 1rem;
    color: var(--text-color);
    line-height: 1.5;
}

/* Join Research Section */
.join-research {
    padding: var(--spacing-xl) 0;
}

.join-card {
    background: linear-gradient(45deg, var(--primary-color), #ef4444);
    color: white;
    border-radius: 15px;
    padding: var(--spacing-lg);
    box-shadow: 0 15px 30px rgba(220, 38, 38, 0.2);
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.join-card h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
}

.join-card p {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.join-card ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
    text-align: left;
    max-width: 500px;
    margin: 0 auto var(--spacing-md);
}

.join-card ul li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    padding-left: 30px;
}

.join-card ul li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: white;
}

.join-card .btn {
    background-color: white;
    color: var(--primary-color);
    border-radius: 30px;
    padding: 12px 30px;
    font-weight: bold;
    transition: all 0.3s ease;
    border: 2px solid white;
    margin-top: 10px;
}

.join-card .btn:hover {
    background-color: transparent;
    color: white;
}

/* Collaboration Section */
.collaboration-section {
    background: var(--bg-light);
    padding: var(--spacing-xl) 0;
}

.collaborators-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.collaborator-item {
    background: var(--bg-color);
    padding: var(--spacing-md);
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.collaborator-item:hover {
    transform: translateY(-5px);
}

.collaborator-item h4 {
    font-size: 1.1rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-xs);
}

.collaborator-item p {
    font-size: 0.9rem;
    color: var(--secondary-color);
}

/* Back-to-Top Button */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 100;
}

.back-to-top.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top:not(.hidden) {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Enhanced Responsiveness */
@media (max-width: 1024px) {
    .methods-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .collaborators-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .research-card {
        padding: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .methods-grid, .collaborators-grid {
        grid-template-columns: 1fr;
    }
    
    .research-intro .intro-content {
        padding: 0 var(--spacing-md);
    }
    
    .research-card h3 {
        font-size: 1.5rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .research-card {
        padding: var(--spacing-md) var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .research-card {
        padding: var(--spacing-sm);
    }
    
    .method-card .method-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .join-card {
        padding: var(--spacing-md);
    }
    
    .join-card h3 {
        font-size: 1.5rem;
    }
    
    .research-card h3 i {
        width: 40px;
        height: 40px;
        font-size: 1.4rem;
    }
}

/* Enhanced Animation Effects */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.research-card.highlight {
    animation: pulse 2s infinite;
    border-color: var(--primary-color);
}