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

:root {
    --black: #0a0a0a;
    --white: #f5f5f5;
    --gray: #888;
    --gray-dark: #1a1a1a;
    --gray-border: #222;
    --font: 'Space Grotesk', sans-serif;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font);
    background: var(--black);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.7;
}

/* NAV */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 3rem;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: transform 0.3s, opacity 0.3s;
}

.nav-mobile {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 99;
    background: var(--black);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-mobile.active {
    display: flex;
}

/* HERO */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    padding: 6rem 3rem 4rem;
    max-width: 1100px;
    margin: 0 auto;
}

.hero-content {
    max-width: 600px;
}

.hero-photo {
    flex-shrink: 0;
}

.hero-img {
    width: 220px;
    height: 220px;
    object-fit: cover;
    object-position: center top;
    border-radius: 50%;
    border: 2px solid var(--gray-border);
    filter: grayscale(30%);
    transition: filter 0.3s;
}

.hero-img:hover {
    filter: grayscale(0%);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.hero-line {
    display: block;
}

.hero-line--sub {
    color: var(--gray);
    margin-top: 0.5rem;
    font-weight: 500;
    font-size: clamp(1.25rem, 3vw, 2rem);
}

.hero-ctas {
    margin-top: 3rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* BUTTONS */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 0;
    transition: all 0.2s;
}

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

.btn--primary:hover {
    opacity: 1;
    background: #ddd;
}

.btn--secondary {
    background: transparent;
    border: 1px solid var(--gray-border);
    color: var(--white);
}

.btn--secondary:hover {
    opacity: 1;
    border-color: var(--white);
}

/* SECTIONS */
.section {
    padding: 6rem 3rem;
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 3rem;
}

/* CARDS */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    border: 1px solid var(--gray-border);
    padding: 2rem;
    transition: border-color 0.3s;
}

.card:hover {
    border-color: var(--gray);
}

.card-number {
    font-size: 0.75rem;
    color: var(--gray);
    margin-bottom: 1rem;
    font-weight: 500;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.card-text {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.7;
}

/* PROJECTS */
.projects {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.project {
    border: 1px solid var(--gray-border);
    padding: 2rem;
    transition: border-color 0.3s;
}

.project:hover {
    border-color: var(--gray);
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.project-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.project-link {
    font-size: 0.875rem;
    font-weight: 500;
    border-bottom: 1px solid var(--gray-border);
    padding-bottom: 2px;
}

.project-badge {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray);
    border: 1px solid var(--gray-border);
    padding: 0.25rem 0.6rem;
    font-weight: 500;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.project-tags span {
    font-size: 0.75rem;
    color: var(--gray);
    border: 1px solid var(--gray-border);
    padding: 0.2rem 0.6rem;
    font-weight: 500;
}

/* STACK */
.stack-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.stack-item {
    border: 1px solid var(--gray-border);
    padding: 1rem 1.5rem;
    transition: border-color 0.3s;
}

.stack-item:hover {
    border-color: var(--white);
}

.stack-name {
    font-size: 0.9rem;
    font-weight: 600;
}

/* CONTACT */
.section--contact {
    text-align: center;
}

.contact-text {
    font-size: 1.125rem;
    color: var(--gray);
    margin-bottom: 2rem;
}

.contact-cta {
    margin-bottom: 2rem;
}

.contact-mail {
    display: inline-block;
    font-size: 0.9rem;
    color: var(--gray);
    border-bottom: 1px solid var(--gray-border);
    padding-bottom: 2px;
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
}

/* FOOTER */
.footer {
    text-align: center;
    padding: 2rem 3rem;
    font-size: 0.75rem;
    color: var(--gray);
    border-top: 1px solid var(--gray-border);
}

/* REVEAL ANIMATIONS */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav {
        padding: 1.25rem 1.5rem;
    }

    .hero {
        flex-direction: column-reverse;
        text-align: center;
        padding: 5rem 1.5rem 3rem;
        gap: 2rem;
    }

    .hero-img {
        width: 150px;
        height: 150px;
    }

    .section {
        padding: 4rem 1.5rem;
    }

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

    .hero-ctas {
        flex-direction: column;
    }

    .btn {
        text-align: center;
    }
}