:root {
    --color-primary: #0066FF;
    --color-primary-light: #3388FF;
    --color-bg: #0A0A0A;
    --color-surface: #111111;
    --color-surface-light: #1A1A1A;
    --color-text: #FFFFFF;
    --color-text-muted: #A0A0A0;
    --color-border: #222222;

    --font-family: 'Press Start 2P', monospace;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-3xl) 0;
}

.section__title {
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: var(--space-xl);
    color: var(--color-text);
}

.section__title::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--color-primary);
    margin-top: var(--space-xs);
}

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav__container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-sm) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav__logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
}

.nav__links {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
}

.nav__link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 400;
    transition: color var(--transition);
}

.nav__link:hover {
    color: var(--color-primary);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: transform var(--transition);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: var(--space-3xl) var(--space-lg);
}

.hero__container {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

.hero__greeting {
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.hero__name {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

.hero__title {
    font-size: clamp(0.625rem, 2.5vw, 0.875rem);
    color: var(--color-text-muted);
    font-weight: 400;
    margin-bottom: var(--space-xl);
}

.hero__cta {
    display: flex;
    gap: var(--space-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 6px;
    transition: all var(--transition);
    cursor: pointer;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-text);
    border: 1px solid var(--color-primary);
}

.btn--primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.btn--ghost:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

.hero__scroll {
    position: absolute;
    bottom: var(--space-xl);
    left: var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.hero__scroll span {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    writing-mode: vertical-rl;
}

.hero__scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
}

/* About */
.about__content {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: var(--space-2xl);
    align-items: start;
}

.about__lead {
    font-size: 0.875rem;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about__text p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.about__stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.stat {
    text-align: center;
    padding: var(--space-md);
    background: var(--color-surface);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.stat__number {
    display: block;
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-primary);
}

.stat__label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: var(--space-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--color-border);
}

.timeline__item {
    position: relative;
    padding-bottom: var(--space-xl);
}

.timeline__item:last-child {
    padding-bottom: 0;
}

.timeline__dot {
    position: absolute;
    left: calc(-1 * var(--space-xl) + 2px);
    top: 6px;
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
}

.timeline__date {
    font-size: 0.75rem;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline__title {
    font-size: 0.875rem;
    font-weight: 400;
    margin: var(--space-xs) 0;
}

.timeline__subtitle {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.timeline__description {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* Skills */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.skill-card {
    padding: var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: border-color var(--transition);
}

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

.skill-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 8px;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
    font-size: 1.5rem;
}

.skill-card__title {
    font-size: 0.8rem;
    font-weight: 400;
    margin-bottom: var(--space-xs);
}

.skill-card__description {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

.contact .section__title::after {
    margin-left: auto;
    margin-right: auto;
}

.contact__description {
    color: var(--color-text-muted);
    max-width: 500px;
    margin: 0 auto var(--space-xl);
}

.contact__links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

.contact__link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-muted);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.875rem;
    transition: all var(--transition);
}

.contact__link:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* Footer */
.footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
}

.footer__text {
    text-align: center;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile */
@media (max-width: 768px) {
    .nav__links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        align-items: center;
        padding: var(--space-lg) 0;
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: transform var(--transition), opacity var(--transition);
    }

    .nav__links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav__toggle {
        display: flex;
    }

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

    .about__stats {
        flex-direction: row;
        justify-content: center;
    }

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

    .contact__links {
        flex-direction: column;
        align-items: center;
    }

    .hero__scroll {
        display: none;
    }
}