:root {
    --font-display: 'Sora', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-border: #e5e5e5;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-tertiary: #999999;
    
    --color-primary: #000000;
    --color-accent: #0066cc;
    
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    --duration-fast: 150ms;
    --duration-base: 300ms;
    --duration-slow: 500ms;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f0f0f;
        --color-surface: #1a1a1a;
        --color-border: #2a2a2a;
        --color-text: #ffffff;
        --color-text-secondary: #b0b0b0;
        --color-text-tertiary: #808080;
    }
}

@media (prefers-color-scheme: dark) {
    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: 
            repeating-linear-gradient(
                45deg,
                transparent,
                transparent 1px,
                rgba(255, 255, 255, 0.03) 1px,
                rgba(255, 255, 255, 0.03) 2px
            ),
            repeating-linear-gradient(
                -45deg,
                transparent,
                transparent 1px,
                rgba(255, 255, 255, 0.03) 1px,
                rgba(255, 255, 255, 0.03) 2px
            );
        pointer-events: none;
        z-index: 0;
        mix-blend-mode: overlay;
    }
    
    body {
        position: relative;
    }
    
    header {
        position: relative;
        z-index: 100;
    }
    
    main {
        position: relative;
        z-index: 2;
    }
    
    footer {
        position: relative;
        z-index: 2;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--duration-base) var(--ease-in-out);
}

@media (prefers-color-scheme: dark) {
    .header {
        background: rgba(15, 15, 15, 0.95);
    }
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-xl);
}

.logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-2xl);
    align-items: center;
}

.nav-links a {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-text);
    transition: width var(--duration-base) var(--ease-out);
}

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

.cta-link {
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-primary);
    color: white !important;
    border-radius: 0.5rem;
    transition: all var(--duration-fast) var(--ease-out);
}

.cta-link:hover {
    background-color: var(--color-accent);
    color: white !important;
}

.cta-link::after {
    display: none;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.hero {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 900px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    max-width: 700px;
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.meta-badge {
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    letter-spacing: 0.05em;
}

.hero-actions {
    display: flex;
    gap: var(--space-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: 0;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    position: relative;
    overflow: hidden;
}

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

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

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

.btn-secondary:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.about {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

.about h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2xl);
    letter-spacing: -0.02em;
}

.about-content {
    max-width: 800px;
}

.about-text {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

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

.featured-projects h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2xl);
    letter-spacing: -0.02em;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.project-item {
    padding: var(--space-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--duration-base) var(--ease-out);
    display: flex;
    flex-direction: column;
}

.project-item:hover {
    border-color: var(--color-text);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.project-item.featured {
    grid-column: span 3;
    border: 2px solid var(--color-text);
}

.project-year {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.project-item h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.project-item p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-lg);
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.project-tags span {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-bg);
    color: var(--color-text-secondary);
    border-radius: 0;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
}

.view-all-projects {
    text-align: center;
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--color-border);
}

.view-all-projects a {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-out);
    display: inline-block;
}

.view-all-projects a:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.arrow {
    transition: all var(--duration-fast) var(--ease-out);
    display: inline-block;
}

.view-all-projects a:hover .arrow {
    transform: translateX(4px);
}

.cv-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

.cv-section h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2xl);
    letter-spacing: -0.02em;
}

.cv-content {
    max-width: 800px;
}

.cv-content p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.cv-content .btn {
    margin-top: var(--space-lg);
}

.cta-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
    text-align: center;
}

.cta-section h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.cta-section > .section-container > p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-links {
    display: flex;
    gap: var(--space-2xl);
    justify-content: center;
    flex-wrap: wrap;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: var(--color-text);
    text-decoration: none;
    border: 1px solid var(--color-border);
    transition: all var(--duration-base) var(--ease-out);
}

.contact-link:hover {
    border-color: var(--color-text);
    background-color: var(--color-surface);
    transform: translateY(-2px);
}

.contact-icon {
    display: inline-block;
    width: 20px;
    text-align: center;
    font-weight: 600;
}

footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.footer-content p {
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    margin: 0;
}

.footer-divider {
    color: var(--color-border);
}

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3.5rem;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xl);
    }

    .project-item.featured {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    :root {
        --space-2xl: 2rem;
        --space-3xl: 2.5rem;
    }

    .nav-links {
        gap: var(--space-lg);
    }

    .hero {
        padding: var(--space-2xl) 0;
        min-height: auto;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

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

    .btn {
        width: 100%;
    }

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

    .project-item.featured {
        grid-column: span 1;
    }

    .cta-links {
        flex-direction: column;
    }

    .contact-link {
        width: 100%;
        justify-content: center;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f0f0f;
        --color-surface: #1a1a1a;
        --color-border: #2a2a2a;
        --color-text: #ffffff;
        --color-text-secondary: #b0b0b0;
        --color-text-tertiary: #808080;
        --color-primary: #4d94ff;
        --color-primary-hover: #6ba3ff;
    }
}

.section-container h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2xl);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin-bottom: var(--space-3xl);
    line-height: 1.7;
}

.hero {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
    min-height: 80vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-text h1 {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), #0099ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.8;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: var(--space-lg);
}

.hero-visual {
    position: relative;
    height: 400px;
    border-radius: 1rem;
    overflow: hidden;
}

.animated-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(-45deg, var(--color-primary), #0099ff, #00ccff, var(--color-primary));
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
    opacity: 0.15;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-100%);
    transition: transform var(--duration-fast) var(--ease-out);
}

.btn:hover::before {
    transform: translateX(0);
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.15);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    box-shadow: 0 4px 16px rgba(0, 102, 204, 0.25);
    transform: translateY(-2px);
}

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

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

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.about-text h2 {
    margin-bottom: var(--space-2xl);
}

.about-text p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.stat {
    padding: var(--space-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    transition: all var(--duration-base) var(--ease-out);
}

.stat:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.1);
}

.stat h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.stat p {
    font-size: 0.95rem;
    color: var(--color-text-tertiary);
    margin: 0;
}

.skills-section {
    padding-top: var(--space-3xl);
    border-top: 1px solid var(--color-border);
}

.skills-section h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-2xl);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
}

.skill-group h4 {
    font-family: var(--font-display);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text);
}

.skill-group p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.6;
}

.projects-preview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
}

.project-preview-card {
    padding: var(--space-2xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--color-text);
    display: flex;
    flex-direction: column;
    transition: all var(--duration-base) var(--ease-out);
}

.project-preview-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.1);
    transform: translateY(-4px);
}

.project-preview-card.featured {
    grid-column: span 3;
    border: 2px solid var(--color-primary);
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.02), transparent);
}

@media (max-width: 768px) {
    .project-preview-card.featured {
        grid-column: span 1;
    }
    
    .projects-preview {
        grid-template-columns: 1fr;
    }
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--space-md);
}

.card-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    flex: 1;
}

.card-label {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background-color: rgba(0, 102, 204, 0.1);
    color: var(--color-primary);
    border-radius: 0.25rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    margin-left: var(--space-lg);
}

.card-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-lg);
    line-height: 1.6;
    flex-grow: 1;
}

.card-details {
    margin-bottom: var(--space-lg);
}

.role {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.card-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.card-tech span {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-bg);
    color: var(--color-text-secondary);
    border-radius: 0.25rem;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.card-cta {
    color: var(--color-primary);
    font-weight: 600;
    transition: all var(--duration-fast) var(--ease-out);
}

.project-preview-card:hover .card-cta {
    transform: translateX(4px);
}

.view-all-link {
    text-align: center;
    margin-top: var(--space-3xl);
    padding-top: var(--space-3xl);
    border-top: 1px solid var(--color-border);
}

.view-all-link a {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-out);
    display: inline-block;
}

.view-all-link a:hover {
    transform: translateX(4px);
}

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

.page-header {
    margin-bottom: var(--space-3xl);
}

.page-header h1 {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.03em;
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 800px;
    line-height: 1.8;
}

.projects-grid-full {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
}

.project-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--space-2xl);
    padding: var(--space-2xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--duration-base) var(--ease-out);
    align-items: start;
}

.project-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.1);
    transform: translateY(-2px);
}

.project-card.featured-card {
    grid-template-columns: 1fr;
    border: 2px solid var(--color-primary);
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.02), transparent);
    padding: var(--space-3xl);
}

.card-meta {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
    min-width: 200px;
}

.category {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background-color: rgba(0, 102, 204, 0.1);
    color: var(--color-primary);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.year {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    white-space: nowrap;
}

.card-main h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    line-height: 1.3;
}

.card-main p {
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tech-stack span {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background-color: var(--color-bg);
    color: var(--color-text-secondary);
    border-radius: 0.25rem;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
}

.card-footer {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: space-between;
    min-width: 120px;
    text-align: right;
}

.read-time {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
}

.arrow {
    font-size: 1.25rem;
    color: var(--color-primary);
    transition: all var(--duration-fast) var(--ease-out);
    margin-top: var(--space-lg);
}

.project-card:hover .arrow {
    transform: translateX(4px);
}

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

.timeline {
    max-width: 800px;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary) 50%, transparent 100%);
}

.timeline-item {
    padding-left: var(--space-3xl);
    padding-bottom: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    position: relative;
}

.timeline-marker {
    position: absolute;
    left: -9px;
    top: 6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid var(--color-bg);
}

.timeline-content h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.role-info {
    font-size: 0.95rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.date {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
    display: block;
}

.timeline-content p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin: 0;
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

.footer-links a:hover {
    color: var(--color-primary);
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

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

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

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

    .project-preview-card.featured {
        grid-column: span 2;
    }

    .project-card {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .card-meta {
        min-width: auto;
    }

    .card-footer {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .arrow {
        margin-top: 0;
    }

    .cta-links {
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    :root {
        --space-2xl: 2rem;
        --space-3xl: 2.5rem;
    }

    .section-container h2 {
        font-size: 2rem;
    }

    .page-header h1 {
        font-size: 2.5rem;
    }

    .hero {
        min-height: auto;
        padding: var(--space-2xl) 0;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-visual {
        height: 300px;
    }

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

    .project-preview-card.featured {
        grid-column: span 1;
    }

    .nav-links {
        gap: var(--space-lg);
    }

    .cta-links {
        flex-direction: column;
    }

    .cta-links .btn {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .section-container {
        padding: 0 1rem;
    }

    .section-container h2 {
        font-size: 1.75rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .hero-title,
    .hero-text h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .project-item h3 {
        font-size: 1.2rem;
    }

    .project-item p {
        font-size: 0.85rem;
    }

    .project-item {
        padding: 1.25rem;
    }

    .projects-grid {
        gap: 0.75rem;
    }

    .project-card {
        padding: 1.25rem;
    }

    .project-card .card-visual {
        height: 100px;
    }

    .footer-content {
        padding: 0 1rem;
        gap: 0.75rem;
    }

    .footer-links {
        gap: 0.75rem;
    }

    .footer-links a {
        font-size: 0.8rem;
    }

    .contact-link {
        padding: 0.85rem 1rem;
        font-size: 0.9rem;
    }
}

.project-item,
.project-card {
  --accent: #4d94ff;
  --accent-soft: rgba(77, 148, 255, 0.18);
  --accent-faint: rgba(77, 148, 255, 0.08);
}

.project-item[data-accent="blue"],
.project-card[data-accent="blue"] {
  --accent: #4d94ff;
  --accent-soft: rgba(77, 148, 255, 0.18);
  --accent-faint: rgba(77, 148, 255, 0.08);
}

.project-item[data-accent="green"],
.project-card[data-accent="green"] {
  --accent: #43d19e;
  --accent-soft: rgba(67, 209, 158, 0.18);
  --accent-faint: rgba(67, 209, 158, 0.08);
}

.project-item[data-accent="amber"],
.project-card[data-accent="amber"] {
  --accent: #ffb020;
  --accent-soft: rgba(255, 176, 32, 0.18);
  --accent-faint: rgba(255, 176, 32, 0.08);
}

.project-item[data-accent="purple"],
.project-card[data-accent="purple"] {
  --accent: #a78bfa;
  --accent-soft: rgba(167, 139, 250, 0.18);
  --accent-faint: rgba(167, 139, 250, 0.08);
}

.project-item[data-accent="cyan"],
.project-card[data-accent="cyan"] {
  --accent: #22d3ee;
  --accent-soft: rgba(34, 211, 238, 0.18);
  --accent-faint: rgba(34, 211, 238, 0.08);
}

.project-item[data-accent="pink"],
.project-card[data-accent="pink"] {
  --accent: #fb7185;
  --accent-soft: rgba(251, 113, 133, 0.18);
  --accent-faint: rgba(251, 113, 133, 0.08);
}

.project-item,
.project-card {
  position: relative;
  overflow: hidden;
  border-radius: 14px;
  transform: translateZ(0);
}

.project-item::after,
.project-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 220ms ease;
  pointer-events: none;
}

.project-item::before,
.project-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  background:
    radial-gradient(
      520px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
      var(--accent-soft),
      transparent 55%
    );
  opacity: 0;
  transition: opacity 220ms ease;
  pointer-events: none;
}

.project-item:hover,
.project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 18px 60px rgba(0,0,0,0.35);
}

.project-item:hover::before,
.project-card:hover::before {
  opacity: 1;
}

.project-item:hover::after,
.project-card:hover::after {
  opacity: 0.9;
}

.project-tags span,
.tech-stack span,
.card-tech span {
  border-radius: 999px;
}

.project-tags span {
  background: rgba(255, 255, 255, 0.02);
}

@media (prefers-color-scheme: dark) {
  .project-tags span {
    background: rgba(255, 255, 255, 0.03);
  }
}

.project-item {
  --accent: #4d94ff;
  --accent-soft: rgba(77, 148, 255, 0.18);
  --accent-faint: rgba(77, 148, 255, 0.08);
}

.project-item[style*="--accent-rgb: 80, 220, 140"] {
  --accent: #50dc8c;
  --accent-soft: rgba(80, 220, 140, 0.18);
  --accent-faint: rgba(80, 220, 140, 0.08);
}

.project-item[style*="--accent-rgb: 55, 220, 230"] {
  --accent: #37dce6;
  --accent-soft: rgba(55, 220, 230, 0.18);
  --accent-faint: rgba(55, 220, 230, 0.08);
}

.project-item[style*="--accent-rgb: 125, 95, 255"] {
  --accent: #7d5fff;
  --accent-soft: rgba(125, 95, 255, 0.18);
  --accent-faint: rgba(125, 95, 255, 0.08);
}

.project-item[style*="--accent-rgb: 255, 140, 55"] {
  --accent: #ff8c37;
  --accent-soft: rgba(255, 140, 55, 0.18);
  --accent-faint: rgba(255, 140, 55, 0.08);
}

.project-item[style*="--accent-rgb: 70, 210, 200"] {
  --accent: #46d2c8;
  --accent-soft: rgba(70, 210, 200, 0.18);
  --accent-faint: rgba(70, 210, 200, 0.08);
}

.project-item[style*="--accent-rgb: 95, 120, 255"],
.project-card[style*="--accent-rgb: 95, 120, 255"] {
  --accent: #5f78ff;
  --accent-soft: rgba(95, 120, 255, 0.18);
  --accent-faint: rgba(95, 120, 255, 0.08);
}

.project-card[style*="--accent-rgb: 80, 220, 140"] {
  --accent: #50dc8c;
  --accent-soft: rgba(80, 220, 140, 0.18);
  --accent-faint: rgba(80, 220, 140, 0.08);
}

.project-card[style*="--accent-rgb: 55, 220, 230"] {
  --accent: #37dce6;
  --accent-soft: rgba(55, 220, 230, 0.18);
  --accent-faint: rgba(55, 220, 230, 0.08);
}

.project-card[style*="--accent-rgb: 125, 95, 255"] {
  --accent: #7d5fff;
  --accent-soft: rgba(125, 95, 255, 0.18);
  --accent-faint: rgba(125, 95, 255, 0.08);
}

.project-card[style*="--accent-rgb: 255, 140, 55"] {
  --accent: #ff8c37;
  --accent-soft: rgba(255, 140, 55, 0.18);
  --accent-faint: rgba(255, 140, 55, 0.08);
}

.project-card[style*="--accent-rgb: 70, 210, 200"] {
  --accent: #46d2c8;
  --accent-soft: rgba(70, 210, 200, 0.18);
  --accent-faint: rgba(70, 210, 200, 0.08);
}

.project-card[style*="--accent-rgb: 255, 95, 95"] {
  --accent: #ff5f5f;
  --accent-soft: rgba(255, 95, 95, 0.18);
  --accent-faint: rgba(255, 95, 95, 0.08);
}

.project-card[style*="--accent-rgb: 255, 180, 50"] {
  --accent: #ffb432;
  --accent-soft: rgba(255, 180, 50, 0.18);
  --accent-faint: rgba(255, 180, 50, 0.08);
}

.project-item .project-visual {
  height: 86px;
  border-radius: 12px;
  margin-bottom: 14px;
  border: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, var(--accent-faint), transparent 55%),
    radial-gradient(500px circle at 20% 30%, var(--accent-faint), transparent 55%),
    radial-gradient(400px circle at 80% 60%, rgba(255,255,255,0.03), transparent 60%);
  transition: all var(--duration-base) var(--ease-out);
}

.project-item:hover .project-visual {
  background:
    linear-gradient(135deg, var(--accent-soft), transparent 55%),
    radial-gradient(500px circle at 20% 30%, var(--accent-soft), transparent 55%),
    radial-gradient(400px circle at 80% 60%, var(--accent-faint), transparent 60%);
  border-color: var(--accent);
}

.project-item.featured .project-visual {
  height: 120px;
}

.project-card {
  grid-template-columns: 140px 1fr auto;
}

.project-card .card-visual {
  width: 140px;
  height: 110px;
  border-radius: 14px;
  border: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, var(--accent-faint), transparent 60%),
    radial-gradient(520px circle at 30% 35%, var(--accent-faint), transparent 55%),
    radial-gradient(420px circle at 80% 70%, rgba(255,255,255,0.03), transparent 60%);
}

.project-card.featured-card {
  grid-template-columns: 180px 1fr auto;
}

.project-card.featured-card .card-visual {
  width: 180px;
  height: 140px;
}

@media (max-width: 768px) {
  .project-card,
  .project-card.featured-card {
    grid-template-columns: 1fr;
  }

  .project-card .card-visual {
    width: 100%;
    height: 140px;
    margin-bottom: 10px;
  }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scroll-animate {
    opacity: 0;
    transform: translateY(20px);
}

.scroll-animate.animate-in {
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ===== MOBILE MENU ===== */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 200;
    flex-direction: column;
    gap: 5px;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 140;
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
}

.mobile-menu-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        height: 100dvh;
        background: rgba(15, 15, 15, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        gap: 0.5rem !important;
        transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 150;
        border-left: 1px solid rgba(255, 255, 255, 0.08);
        overflow-y: auto;
    }

    .nav-links.open {
        right: 0;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block !important;
        width: 100%;
        padding: 1rem 1.2rem !important;
        font-size: 1.1rem !important;
        border-radius: 0.5rem;
        color: #b0b0b0 !important;
    }

    .nav-links a:hover,
    .nav-links a.active {
        color: #ffffff !important;
        background: rgba(255, 255, 255, 0.08);
    }

    .nav-links .cta-link {
        margin-top: 1rem;
        text-align: center;
    }

    .mobile-menu-overlay {
        display: block;
    }

    .mobile-menu-toggle.active .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .mobile-menu-toggle.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }
    .mobile-menu-toggle.active .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}