/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-bg: #0a0a0a;
    --color-bg-light: #111111;
    --color-bg-card: #1a1a1a;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-border: #2a2a2a;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --container-width: 1100px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 18px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

h1, h2, h3 {
    line-height: 1.2;
    font-weight: 600;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

p {
    color: var(--color-text-muted);
}

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

a:hover {
    color: var(--color-accent-hover);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-text);
    transform: translateY(-2px);
}

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

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.nav-logo:hover {
    color: var(--color-text);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.nav-menu a:hover {
    color: var(--color-text);
}

.nav-cta {
    padding: 0.5rem 1rem;
    background-color: var(--color-accent);
    color: var(--color-text) !important;
    border-radius: 5px;
}

.nav-cta:hover {
    background-color: var(--color-accent-hover);
}

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-light) 100%);
}

.hero-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.hero h1 {
    margin-bottom: var(--spacing-md);
    max-width: 800px;
}

.hero-sub {
    font-size: 1.25rem;
    max-width: 650px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-muted);
}

/* Work Section */
.work {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-light);
}

.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.work-card {
    padding: var(--spacing-md);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.work-card:hover {
    border-color: var(--color-text-muted);
    transform: translateY(-4px);
}

.work-card h3 {
    color: var(--color-text);
}

/* Projects Section */
.projects {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-light);
}

/* Row 1: Top 3 cards */
.projects-row-top {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

/* Row 2: Bottom 2 larger cards */
.projects-row-bottom {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

/* Standard project card (Row 1) */
.project-card {
    padding: var(--spacing-md);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.project-card:hover {
    border-color: var(--color-text-muted);
    transform: translateY(-4px);
}

.project-card h3 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

/* Large project card (Row 2) */
.project-card-large {
    padding: var(--spacing-lg);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.project-card-large:hover {
    border-color: var(--color-text-muted);
    transform: translateY(-4px);
}

.project-card-large h3 {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

/* Project tag */
.project-tag {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

/* Project tech tags */
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.project-tech span {
    padding: 0.375rem 0.75rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* Project links container */
.project-links {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

/* Small button for cards */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Approach */
.approach {
    padding: var(--spacing-xl) 0;
}

.approach p {
    font-size: 1.125rem;
    max-width: 700px;
    margin-bottom: var(--spacing-md);
}

.approach p:last-child {
    color: var(--color-text);
}

/* Footer */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: linear-gradient(180deg, var(--color-bg-light) 0%, var(--color-bg) 100%);
    border-top: 1px solid var(--color-border);
}

.footer-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--color-border);
}

.footer-content {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.footer-content h2 {
    margin-bottom: var(--spacing-sm);
}

.footer-content > p {
    max-width: 500px;
    margin: 0 auto var(--spacing-md);
}

.footer-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.875rem;
}

/* Mobile */
@media (max-width: 768px) {
    body {
        font-size: 16px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        display: none;
    }

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

    .hero {
        min-height: auto;
        padding: calc(var(--spacing-xl) + 60px) 0 var(--spacing-xl);
    }

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

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

    .project-card-large {
        padding: var(--spacing-md);
    }

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

    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
    .work-card,
    .project-card,
    .project-card-large {
        opacity: 0;
        transform: translateY(20px);
        animation: fadeInUp 0.6s ease forwards;
    }

    .work-card:nth-child(1) { animation-delay: 0.1s; }
    .work-card:nth-child(2) { animation-delay: 0.2s; }
    .work-card:nth-child(3) { animation-delay: 0.3s; }

    .project-card:nth-child(1) { animation-delay: 0.1s; }
    .project-card:nth-child(2) { animation-delay: 0.2s; }
    .project-card:nth-child(3) { animation-delay: 0.3s; }

    .project-card-large:nth-child(1) { animation-delay: 0.4s; }
    .project-card-large:nth-child(2) { animation-delay: 0.5s; }
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}