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

/* Skip to content link - visible only on keyboard focus */
.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 2000;
    padding: 12px 24px;
    background: #4ade80;
    color: #000000;
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    border-radius: 0 0 4px 4px;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #4ade80;
    outline-offset: 3px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #ffffff;
    background: #000000;
    min-height: 100vh;
    padding: 0;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #1a1a1a;
    z-index: 1000;
    padding: 20px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.5px;
    color: #ffffff;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    color: #888888;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 40px 80px;
}

.hero {
    margin-bottom: 120px;
}

h1 {
    font-size: 56px;
    font-weight: 600;
    color: #ffffff;
    line-height: 1.2;
    margin-bottom: 30px;
    letter-spacing: -1px;
}

.hero-description {
    font-size: 20px;
    color: #a0a0a0;
    line-height: 1.7;
    max-width: 700px;
}

.divider {
    display: none;
}

.section {
    margin-bottom: 80px;
}

.section-title {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #666666;
    margin-bottom: 30px;
    font-weight: 500;
}

h2 {
    font-size: 36px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.section-content {
    font-size: 18px;
    color: #cccccc;
    line-height: 1.8;
    margin-bottom: 30px;
}

.project-card {
    background: #0a0a0a;
    border: 1px solid #1a1a1a;
    border-radius: 8px;
    padding: 40px;
    margin-bottom: 40px;
    transition: border-color 0.3s ease;
}

.project-card:hover {
    border-color: #333333;
}

.project-title {
    font-size: 24px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 15px;
}

.project-meta {
    font-size: 14px;
    color: #666666;
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.metric {
    padding: 25px;
    background: #050505;
    border: 1px solid #1a1a1a;
    border-radius: 4px;
    text-align: center;
    transition: all 0.3s ease;
}

.metric:hover {
    border-color: #333333;
    transform: translateY(-2px);
}

.metric-value {
    font-size: 36px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 8px;
}

.metric-label {
    font-size: 13px;
    color: #888888;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.research-card {
    background: linear-gradient(135deg, #0a0a0a 0%, #050505 100%);
    border: 1px solid #1a1a1a;
    border-radius: 8px;
    padding: 35px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.research-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #333333, #666666);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.research-card:hover {
    border-color: #333333;
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.research-card:hover:before {
    opacity: 1;
}

.research-icon {
    width: 50px;
    height: 50px;
    background: #1a1a1a;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
}

.research-card-title {
    font-size: 18px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 12px;
    line-height: 1.3;
}

.research-card-description {
    font-size: 15px;
    color: #999999;
    line-height: 1.6;
}

.research-focus-heading {
    font-size: 20px;
    color: #ffffff;
    margin: 50px 0 30px;
}

.project-summary {
    margin-top: 50px;
}

.contact-link {
    display: inline-block;
    color: #ffffff;
    text-decoration: none;
    font-size: 18px;
    padding: 16px 32px;
    border: 1px solid #333333;
    border-radius: 4px;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.contact-link:hover {
    border-color: #666666;
    background: #0a0a0a;
}

footer,
.footer {
    margin-top: 120px;
    padding-top: 40px;
    border-top: 1px solid #1a1a1a;
}

.footer a {
    color: #666666;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: #ffffff;
}

.footer-text {
    color: #444444;
    font-size: 14px;
    margin-top: 20px;
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
    }

    .nav-links {
        gap: 20px;
    }

    .nav-links a {
        font-size: 12px;
    }

    .container {
        padding: 100px 20px 60px;
    }

    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 28px;
    }

    .hero-description {
        font-size: 18px;
    }

    .section-content {
        font-size: 16px;
    }

    .project-card {
        padding: 30px 20px;
    }

    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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