:root {
    --primary-color: #4361ee;
    --primary-dark: #3730a3;
    --primary-light: #818cf8;
    --text-color: #1f2937;
    --background-color: #ffffff;
    --secondary-background: #f8fafc;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

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

/* Header Styles */
.site-header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(67, 97, 238, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: opacity 0.2s;
}

.logo:hover {
    opacity: 0.9;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Hero Sections */
.hero, .research-hero {
    background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
    color: white;
    padding: 8rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.main-hero::before {
    background: 
        radial-gradient(circle at 20% 150%, rgba(129, 140, 248, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% -50%, rgba(129, 140, 248, 0.15) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FFFFFF' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}


.research-hero::before {
    background: 
        radial-gradient(circle at 20% 150%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% -50%, rgba(167, 139, 250, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 10% 0%, rgba(79, 70, 229, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 90% 90%, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
}

.hero::after, .research-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FFFFFF' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
    pointer-events: none;
}

.hero h1, .research-hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.lead {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.9;
    position: relative;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    position: relative;
}

.button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
}

.button.primary {
    background: linear-gradient(to right, #ffffff, #f8fafc);
    color: var(--primary-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.button.secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(4px);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.button:hover {
    transform: translateY(-2px);
}

.button.primary:hover {
    background: #ffffff;
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.button.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    text-align: center;
    position: relative;
    flex: 1;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(67, 97, 238, 0.1), transparent);
}

.features h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    position: relative;
}

.features h2::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #4361ee, #818cf8);
    border-radius: 3px;
}

.features p {
    max-width: 800px;
    margin: 0 auto;
    color: #4b5563;
    position: relative;
    z-index: 1;
}

/* Research Page */
.research-content {
    padding: 4rem 0;
    background: linear-gradient(180deg, #ffffff 100%, #f8fafc 0%);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.research-item {
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.research-item h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
}

.research-areas {
    list-style: none;
    padding: 0;
}

.research-areas li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #e5e7eb;
    color: #4b5563;
}

.research-areas li:last-child {
    border-bottom: none;
}

/* Footer */
.site-footer {
    background-color: rgba(248, 250, 252, 0.9);
    padding: 2rem 0;
    text-align: center;
    color: #6b7280;
    border-top: 1px solid rgba(67, 97, 238, 0.1);
    position: relative;
    z-index: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1, .research-hero h1 {
        font-size: 2.5rem;
    }
    
    .lead {
        font-size: 1.125rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .button {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }

    .research-grid {
        grid-template-columns: 1fr;
    }
}