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


html {
    scroll-behavior: smooth;
}


body {
    font-family: Arial, Helvetica, sans-serif;
    background: #ffffff;
    color: #171717;
    line-height: 1.7;
}


a {
    color: inherit;
    text-decoration: none;
}


/* Navigation */

nav {
    border-bottom: 1px solid #e5e5e5;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
}


.nav-container {
    max-width: 1100px;
    margin: auto;
    padding: 20px 30px;

    display: flex;
    justify-content: space-between;
    align-items: center;
}


.logo {
    font-weight: 700;
    font-size: 18px;
}


.nav-links {
    display: flex;
    gap: 28px;
    font-size: 14px;
}


.nav-links a:hover {
    color: #666666;
}


/* Hero */

.hero {
    max-width: 1100px;
    margin: auto;
    padding: 140px 30px 130px;
}


.hero-text {
    max-width: 800px;
}


.eyebrow {
    font-size: 13px;
    letter-spacing: 2px;
    color: #666666;
    margin-bottom: 25px;
}


h1 {
    font-size: clamp(45px, 7vw, 82px);
    line-height: 1.05;
    letter-spacing: -3px;
    margin-bottom: 30px;
}


h1 span {
    color: #777777;
}


.intro {
    max-width: 650px;
    font-size: 20px;
    color: #555555;
}


.buttons {
    margin-top: 40px;
    display: flex;
    gap: 15px;
}


.button {
    padding: 13px 22px;
    border: 1px solid #171717;
    font-size: 14px;
}


.button.primary {
    background: #171717;
    color: white;
}


.button.secondary:hover {
    background: #f3f3f3;
}


/* Sections */

section:not(.hero) {
    max-width: 1100px;
    margin: auto;
    padding: 110px 30px;
    border-top: 1px solid #e5e5e5;
}


.section-label {
    font-size: 12px;
    letter-spacing: 2px;
    color: #777777;
    margin-bottom: 20px;
}


h2 {
    font-size: 42px;
    letter-spacing: -1px;
    margin-bottom: 35px;
}


section p {
    max-width: 750px;
    color: #555555;
}


/* Research */

.research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}


.research-card {
    border: 1px solid #e5e5e5;
    padding: 30px;
}


.research-card h3 {
    margin-bottom: 12px;
    font-size: 21px;
}


.research-card:hover {
    border-color: #999999;
}


/* Projects */

.project {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 30px;

    padding: 35px 0;
    border-top: 1px solid #e5e5e5;
}


.project-number {
    color: #888888;
    font-size: 14px;
}


.project h3 {
    font-size: 25px;
    margin-bottom: 12px;
}


.project-tags {
    margin-top: 15px;
    font-size: 13px;
    color: #777777;
}


/* Contact */

.contact-links {
    margin-top: 35px;
    display: flex;
    gap: 30px;
}


.contact-links a {
    border-bottom: 1px solid #171717;
    padding-bottom: 3px;
}


/* Footer */

footer {
    max-width: 1100px;
    margin: auto;
    padding: 40px 30px;
    border-top: 1px solid #e5e5e5;
}


footer p {
    font-size: 13px;
    color: #777777;
}


/* Mobile */

@media (max-width: 700px) {

    .nav-container {
        padding: 18px 20px;
    }

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

    .hero {
        padding: 100px 20px;
    }

    h1 {
        letter-spacing: -2px;
    }

    section:not(.hero) {
        padding: 80px 20px;
    }

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

    .project {
        grid-template-columns: 1fr;
        gap: 10px;
    }

}