```css
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Inter", Arial, sans-serif;
    background: #f5f6f8;
    color: #15171a;
    line-height: 1.6;
}

.container {
    width: min(1120px, 92%);
    margin: auto;
}


/* HEADER */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.94);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #e5e7eb;
}

.nav-container {
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    text-decoration: none;
    color: #111;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span {
    font-weight: 800;
}

nav {
    display: flex;
    gap: 28px;
}

nav a {
    text-decoration: none;
    color: #555;
    font-size: 14px;
    font-weight: 600;
    transition: .2s;
}

nav a:hover {
    color: #000;
}

.menu-toggle {
    display: none;
    border: 0;
    background: none;
    font-size: 25px;
}


/* HERO */

.hero {
    min-height: 700px;
    display: flex;
    align-items: center;
    background:
        radial-gradient(circle at 80% 20%, #e5e7eb, transparent 35%),
        #f5f6f8;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.5fr .8fr;
    gap: 80px;
    align-items: center;
}

.eyebrow {
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 2px;
    color: #777;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: clamp(48px, 7vw, 82px);
    line-height: 1;
    letter-spacing: -4px;
    max-width: 800px;
}

.hero h1 span {
    display: block;
    color: #666;
}

.hero-description {
    max-width: 650px;
    margin-top: 30px;
    font-size: 18px;
    color: #666;
}

.hero-buttons {
    display: flex;
    gap: 14px;
    margin-top: 35px;
}

.btn {
    display: inline-block;
    padding: 14px 22px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    transition: .25s;
}

.primary-btn {
    background: #111;
    color: white;
}

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

.secondary-btn {
    border: 1px solid #ccc;
    color: #111;
}

.secondary-btn:hover {
    background: white;
}


/* HERO CARD */

.hero-card {
    background: #111;
    color: white;
    border-radius: 20px;
    padding: 45px 35px;
    text-align: center;
    box-shadow: 0 25px 60px rgba(0,0,0,.15);
}

.hero-logo {
    width: 90px;
    height: 90px;
    margin: auto;
    display: grid;
    place-items: center;
    border: 2px solid white;
    border-radius: 50%;
    font-size: 42px;
    font-weight: 800;
}

.hero-card h2 {
    margin-top: 25px;
    font-size: 30px;
}

.hero-card p {
    margin-top: 15px;
    color: #bbb;
}


/* SECTIONS */

.section {
    padding: 110px 0;
}

.section-heading {
    max-width: 720px;
    margin-bottom: 55px;
}

.section-heading h2 {
    font-size: clamp(36px, 5vw, 58px);
    line-height: 1.05;
    letter-spacing: -2px;
}

.section-heading > p:last-child {
    margin-top: 20px;
    color: #666;
}


/* ABOUT */

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
}

.large-text {
    font-size: 25px;
    line-height: 1.5;
    color: #333;
}

.about-info {
    border-top: 1px solid #ddd;
}

.info-item {
    padding: 22px 0;
    border-bottom: 1px solid #ddd;
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.info-item span {
    color: #777;
    text-align: right;
}


/* DARK SECTION */

.dark-section {
    background: #111;
    color: white;
}

.dark-section .eyebrow {
    color: #888;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.skill-card {
    border: 1px solid #333;
    padding: 30px;
    min-height: 250px;
    transition: .25s;
}

.skill-card:hover {
    background: #1a1a1a;
    transform: translateY(-5px);
}

.skill-number {
    color: #777;
    font-size: 13px;
    margin-bottom: 50px;
}

.skill-card h3 {
    font-size: 21px;
}

.skill-card p {
    margin-top: 12px;
    color: #999;
    font-size: 14px;
}


/* PROJECTS */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.project-card {
    background: white;
    border: 1px solid #e3e3e3;
    border-radius: 14px;
    overflow: hidden;
    transition: .25s;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 45px rgba(0,0,0,.08);
}

.project-image {
    height: 260px;
    display: grid;
    place-items: center;
    background: #dedede;
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -1px;
}

.project-image span {
    padding: 15px 20px;
    border: 2px solid #111;
    background: rgba(255,255,255,.35);
}

.nano-it {
    background: #d9dde1;
}

.nano-device {
    background: #c9ced3;
}

.nano-time {
    background: #e2e2e2;
}

.nano-code {
    background: #d3d3d3;
}

.nano-call {
    background: #c5c5c5;
}

.project-content {
    padding: 30px;
}

.project-category {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: #888;
}

.project-content h3 {
    font-size: 30px;
    margin-top: 7px;
}

.project-content p:not(.project-category) {
    color: #666;
    margin: 15px 0 25px;
}

.project-content a {
    text-decoration: none;
    color: #111;
    font-weight: 800;
}


/* EXPERIENCE */

.experience-section {
    background: white;
}

.timeline {
    max-width: 850px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 30px 1fr;
    gap: 25px;
    padding: 30px 0;
    border-bottom: 1px solid #ddd;
}

.timeline-dot {
    width: 12px;
    height: 12px;
    margin-top: 8px;
    background: #111;
    border-radius: 50%;
}

.timeline-item h3 {
    font-size: 22px;
}

.timeline-item p {
    color: #666;
    margin-top: 8px;
}


/* CONTACT */

.contact-section {
    background: #eceeef;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 80px;
    align-items: center;
}

.contact-grid h2 {
    font-size: clamp(40px, 5vw, 65px);
    line-height: 1;
    letter-spacing: -2px;
}

.contact-grid p:not(.eyebrow) {
    margin-top: 25px;
    color: #666;
}

.contact-box {
    background: white;
    padding: 35px;
    border-radius: 15px;
}

.contact-box div {
    padding: 20px 0;
    border-bottom: 1px solid #ddd;
}

.contact-box div:last-child {
    border-bottom: 0;
}

.contact-box span {
    display: block;
    font-size: 12px;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-box strong {
    display: block;
    margin-top: 7px;
}


/* FOOTER */

footer {
    background: #111;
    color: white;
    padding: 35px 0;
}

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

.footer-content p {
    color: #888;
    font-size: 13px;
}


/* MOBILE */

@media (max-width: 850px) {

    .menu-toggle {
        display: block;
    }

    nav {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: white;
        padding: 25px;
        flex-direction: column;
        border-bottom: 1px solid #ddd;
    }

    nav.active {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 90px 0;
    }

    .hero-content,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero-content {
        gap: 50px;
    }

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

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

    .footer-content {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }
}


@media (max-width: 550px) {

    .section {
        padding: 75px 0;
    }

    .hero h1 {
        font-size: 48px;
        letter-spacing: -2px;
    }

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

    .info-item {
        flex-direction: column;
    }

    .info-item span {
        text-align: left;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }
}
```