@charset "utf-8";

/* Modern Design System */
:root {
    --primary-blue: #aa9100bd;
    --primary-blue-hover: #c8ad00;
    --success-green: #10b981;
    --success-green-hover: #059669;
    --info-cyan: #06b6d4;
    --info-cyan-hover: #0891b2;
    --warning-yellow: #f59e0b;
    --warning-yellow-hover: #d97706;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #bdd6e3;
    --bg-gray-50: #f9f9fa;
    --bg-gray-100: #f3f4f6;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius: 0.75rem;
    --transition: all 0.3s ease;
}

/* Base Styles */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

/* Improved Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-weight: 600;
    font-size: 0.875rem;
    line-height: 1.25rem;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    text-transform: none;
    letter-spacing: normal;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.btn-primary:hover {
    background-color: var(--primary-blue-hover);
    border-color: var(--primary-blue-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background-color: var(--success-green);
    color: white;
    border-color: var(--success-green);
}

.btn-success:hover {
    background-color: var(--success-green-hover);
    border-color: var(--success-green-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-info {
    background-color: var(--info-cyan);
    color: white;
    border-color: var(--info-cyan);
}

.btn-info:hover {
    background-color: var(--info-cyan-hover);
    border-color: var(--info-cyan-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background-color: var(--warning-yellow);
    color: var(--text-dark);
    border-color: var(--warning-yellow);
}

.btn-warning:hover {
    background-color: var(--warning-yellow-hover);
    border-color: var(--warning-yellow-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    background-color: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn-outline-primary:hover {
    background-color: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

/* Section Styling */
section {
    padding: 4rem 0;
    background-color: var(--bg-gray-50);
}

section:nth-child(even) {
    background-color: var(--bg-gray-50);
}

/* Research Section Improvements */
.research-item {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--bg-gray-100);
}

.research-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.research-video-container {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: 1rem;
}

.research-video-container video,
.research-video-container img {
    width: 100%;
    height: auto;
    display: block;
}

.research-content {
    padding: 1.5rem 0;
}

.research-content h4 {
    color: var(--text-dark);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.research-content p {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.research-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Research Section - Tile Layout */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.research-tile {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--bg-gray-100);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.research-tile:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.research-tile-media {
    width: 100%;
    height: 220px;
    overflow: hidden;
    position: relative;
}

.research-tile-media video,
.research-tile-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.research-tile-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.research-tile-content h4 {
    color: var(--text-dark);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.research-tile-content p {
    color: var(--text-gray);
    margin-bottom: auto;
    line-height: 1.6;
    font-size: 0.9rem;
}

.research-tile-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

/* Remove old research-item styles for tile layout */
.research-item {
    display: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .research-buttons {
        flex-direction: column;
    }
    
    .research-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .research-item {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .research-tile-media {
        height: 200px;
    }
    
    .research-tile-content {
        padding: 1rem;
    }
    
    .research-tile-buttons {
        flex-direction: column;
    }
    
    .research-tile-buttons .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .research-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .research-tile-media {
        height: 180px;
    }
}

/* Publications Section */
.publications-list {
    counter-reset: item;
}

.publications-list li {
    counter-increment: item;
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-blue);
    position: relative;
    transition: var(--transition);
    list-style:none;
}

.publications-list li:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.publications-list li::before {
    content: counter(item);
    position: absolute;
    left: -15px;
    top: 1.5rem;
    width: 30px;
    height: 30px;
    background: var(--primary-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

/* Contact Links */
.contact-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .contact-links {
        flex-direction: column;
    }
}

/* Header Section */
#name {
    background: linear-gradient(135deg, var(--bg-gray-50) 0%, var(--bg-white) 100%);
    padding: 5rem 0;
}

/* Typography Improvements */
h1 {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

h2 {
    font-size: clamp(2rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 2rem;
    text-align: center;
}

h4 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

/* Utility Classes */
.me-2 {
    margin-right: 0.5rem;
}

.mb-3 {
    margin-bottom: 1rem;
}

.mb-4 {
    margin-bottom: 1.5rem;
}

.mb-5 {
    margin-bottom: 3rem;
}

.text-muted {
    color: var(--text-gray);
}

.lead {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-gray);
}