:root {
    --bg: #fafafa;
    --bg-secondary: #f0f0f0;
    --fg: #0a0a0a;
    --fg-muted: #6b6b6b;
    --accent: #0a0a0a;
    --border: #e0e0e0;
    --card: #ffffff;
    --mono: 'JetBrains Mono', monospace;
    --sans: 'Space Grotesk', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--sans);
    background-color: var(--bg);
    color: var(--fg);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.012;
    z-index: 1000;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 1px;
    background: var(--fg);
    z-index: 1001;
    transform-origin: left;
    transform: scaleX(0);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 3rem;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 250, 250, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: transform 0.3s ease;
}

.nav-hidden {
    transform: translateY(-100%);
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--fg);
    text-decoration: none;
}

.logo span {
    color: var(--fg-muted);
    font-weight: 400;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links li {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--fg-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    position: relative;
    transition: color 0.2s ease;
    padding: 0.25rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--fg);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--fg);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links .active-indicator {
    position: absolute;
    left: -14px;
    width: 4px;
    height: 4px;
    background: var(--fg);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-links li.active .active-indicator {
    opacity: 1;
}

.nav-links li.active a {
    color: var(--fg);
}

section {
    min-height: 100vh;
    padding: 8rem 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

#hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 6rem;
    min-height: 100vh;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-tag {
    font-family: var(--mono);
    font-size: 0.85rem;
    color: var(--fg-muted);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-tag::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--fg-muted);
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--fg-muted);
    margin-left: 2px;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

h1 span {
    display: block;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--fg-muted);
    max-width: 520px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.8rem;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 2px;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    font-family: var(--sans);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

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

#about {
    background: var(--bg-secondary);
}

.section-header {
    margin-bottom: 4rem;
}

.section-number {
    font-family: var(--mono);
    font-size: 0.85rem;
    color: var(--fg-muted);
    margin-bottom: 1rem;
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.about-text p {
    color: var(--fg-muted);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-text p:first-of-type::first-letter {
    font-size: 3.5rem;
    font-weight: 600;
    float: left;
    line-height: 1;
    margin-right: 0.5rem;
    color: var(--fg);
}

.info-list {
    list-style: none;
}

.info-list li {
    display: flex;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    transition: all 0.2s ease;
}

.info-list li:hover {
    padding-left: 0.5rem;
    border-color: var(--fg-muted);
}

.info-list li:first-child {
    border-top: 1px solid var(--border);
}

.info-label {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--fg-muted);
    width: 120px;
    flex-shrink: 0;
}

.info-value {
    font-weight: 500;
}

.projects-grid {
    display: grid;
    gap: 2rem;
}

.project-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
    cursor: pointer;
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    border-color: var(--fg);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
}

.project-image {
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    position: relative;
    overflow: hidden;
}

.project-image-placeholder {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--fg-muted);
    position: absolute;
    bottom: 1rem;
    right: 1rem;
}

.project-visual {
    width: 60px;
    height: 60px;
    border: 2px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s ease;
}

.project-card:hover .project-visual {
    border-color: var(--fg);
    transform: scale(1.1) rotate(5deg);
}

.project-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.project-tag {
    font-family: var(--mono);
    font-size: 0.7rem;
    padding: 0.3rem 0.6rem;
    background: var(--bg-secondary);
    border-radius: 2px;
    color: var(--fg-muted);
    transition: all 0.2s ease;
}

.project-card:hover .project-tag {
    background: var(--border);
}

.project-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.project-description {
    color: var(--fg-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--fg);
    text-decoration: none;
    font-weight: 500;
    transition: gap 0.2s ease;
}

.project-link:hover {
    gap: 0.8rem;
}

.project-link svg {
    width: 16px;
    height: 16px;
}

/* Project Modal */
.project-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(12px);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    overflow-y: auto;
}

.project-modal.active {
    opacity: 1;
    visibility: visible;
}

.project-modal-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 3rem;
    transform: translateY(30px);
    transition: transform 0.4s ease;
}

.project-modal.active .project-modal-content {
    transform: translateY(0);
}

.modal-close {
    position: fixed;
    top: 2rem;
    right: 3rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 201;
}

.modal-close:hover {
    border-color: var(--fg);
    transform: rotate(90deg);
}

.modal-close svg {
    width: 16px;
    height: 16px;
}

.modal-header {
    margin-bottom: 3rem;
}

.modal-breadcrumb {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--fg-muted);
    margin-bottom: 1rem;
}

.modal-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.modal-meta {
    display: flex;
    gap: 2rem;
    font-size: 0.9rem;
    color: var(--fg-muted);
}

.modal-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-meta-item svg {
    width: 16px;
    height: 16px;
}

.modal-body {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.modal-section {
    margin-bottom: 2.5rem;
}

.modal-section-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--fg-muted);
    margin-bottom: 1rem;
}

.modal-description {
    color: var(--fg-muted);
    line-height: 1.8;
}

.modal-description p {
    margin-bottom: 1rem;
}

/* Modal Content Styles: Images & Code */
.modal-image {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--border);
    border-radius: 4px;
    margin: 2rem 0;
    display: block;
}

.modal-code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.25rem;
    margin: 2rem 0;
    overflow-x: auto;
    font-family: var(--mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--fg);
}

.modal-description code {
    font-family: var(--mono);
    font-size: 0.85em;
    background: var(--bg-secondary);
    padding: 0.2em 0.4em;
    border-radius: 2px;
}

.code-header {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--fg-muted);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.code-lang {
    display: inline-block;
    background: var(--border);
    padding: 0.2rem 0.5rem;
    border-radius: 2px;
    margin-left: 0.5rem;
    text-transform: none;
    letter-spacing: 0;
}

.modal-features {
    list-style: none;
}

.modal-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--fg-muted);
}

.modal-features li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--fg);
    border-radius: 50%;
    margin-top: 0.5rem;
    flex-shrink: 0;
}

.modal-sidebar {
    position: sticky;
    top: 4rem;
}

.modal-tech-stack {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.tech-stack-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-badge {
    font-family: var(--mono);
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
    background: var(--bg-secondary);
    border-radius: 2px;
    color: var(--fg);
}

.modal-resources {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.5rem;
}

.modal-resource-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    color: var(--fg);
    transition: all 0.2s ease;
}

.modal-resource-link:last-child {
    border-bottom: none;
}

.modal-resource-link:hover {
    color: var(--fg-muted);
    transform: translateX(4px);
}

.modal-resource-link svg {
    width: 16px;
    height: 16px;
}

.modal-resource-info {
    flex: 1;
}

.modal-resource-title {
    font-size: 0.9rem;
    font-weight: 500;
}

.modal-resource-type {
    font-size: 0.75rem;
    color: var(--fg-muted);
    font-family: var(--mono);
}

#skills {
    background: var(--bg-secondary);
}

.skills-modern {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    margin-top: 3rem;
}

.skill-row {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 2rem;
    align-items: start;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.skill-row.visible {
    opacity: 1;
    transform: translateY(0);
}

.skill-row:first-child {
    border-top: 1px solid var(--border);
}

.skill-label {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--fg-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-top: 0.3rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.skill-tag {
    font-size: 0.95rem;
    color: var(--fg);
    padding: 0.4rem 0.9rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 2px;
    transition: all 0.2s ease;
    cursor: default;
}

.skill-tag:hover {
    border-color: var(--fg);
    transform: translateY(-2px);
}

#contact {
    min-height: auto;
    padding-bottom: 4rem;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    color: var(--fg-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    color: var(--fg);
    transition: all 0.2s ease;
}

.contact-link:first-child {
    border-top: 1px solid var(--border);
}

.contact-link:hover {
    padding-left: 1rem;
    border-color: var(--fg-muted);
}

.contact-link-label {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--fg-muted);
    width: 80px;
}

.contact-link-value {
    font-weight: 500;
}

footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--fg-muted);
}

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

footer a:hover {
    opacity: 0.7;
}

.footer-time {
    font-family: var(--mono);
    font-size: 0.8rem;
}

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

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

@media (max-width: 900px) {
    .container {
        padding: 0 1.5rem;
    }

    section {
        padding: 6rem 0;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .project-card {
        grid-template-columns: 1fr;
    }

    .project-image {
        min-height: 200px;
    }

    .skill-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .modal-body {
        grid-template-columns: 1fr;
    }

    .modal-sidebar {
        position: static;
    }

    .modal-close {
        right: 1.5rem;
    }

    footer .container {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .nav-links .active-indicator {
        display: none;
    }

    h1 {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .skill-tags {
        gap: 0.5rem;
    }

    .skill-tag {
        font-size: 0.85rem;
        padding: 0.35rem 0.7rem;
    }

    .project-modal-content {
        padding: 3rem 1.5rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }

    html {
        scroll-behavior: auto;
    }
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 4px;
}