/* ================================
   RESET & BASE STYLES
   ================================ */

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

:root {
    /* Colors */
    --black: #000000;
    --white: #ffffff;
    --gray: #1a1a1a;
    --accent: #0066ff;

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s ease;
}

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

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

::selection {
    background: var(--black);
    color: var(--white);
}

/* ================================
   TYPOGRAPHY
   ================================ */

h1, h2, h3 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.1;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all var(--transition-fast);
}

strong {
    font-weight: 600;
}

/* ================================
   LAYOUT
   ================================ */

.section {
    min-height: 100vh;
    padding: var(--spacing-xl) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

/* ================================
   HERO SECTION
   ================================ */

.hero {
    position: relative;
    background: var(--white);
}

.hero-content {
    text-align: left;
}

.hero-title {
    font-size: clamp(4rem, 12vw, 10rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.hero-title .line {
    display: block;
    animation: slideUp 0.8s ease forwards;
    opacity: 0;
}

.hero-title .line:nth-child(1) {
    animation-delay: 0.1s;
}

.hero-title .line:nth-child(2) {
    animation-delay: 0.3s;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    opacity: 0;
    animation: fadeIn 0.8s ease forwards 0.6s;
}

.hero-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    font-size: 1rem;
    opacity: 0;
    animation: fadeIn 0.8s ease forwards 0.8s;
}

.hero-links a {
    position: relative;
    padding-bottom: 2px;
}

.hero-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition-smooth);
}

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

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    opacity: 0;
    animation: fadeIn 0.8s ease forwards 1s;
}

.scroll-line {
    width: 2px;
    height: 60px;
    background: var(--black);
    margin: var(--spacing-sm) auto 0;
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 30%;
    background: var(--accent);
    animation: scrollMove 1.5s ease-in-out infinite;
}

/* ================================
   ABOUT SECTION
   ================================ */

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

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

.section-title {
    font-size: clamp(3rem, 8vw, 6rem);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.title-block {
    background: var(--white);
    color: var(--black);
    padding: 0 var(--spacing-sm);
    display: inline-block;
    margin-right: var(--spacing-sm);
}

.about .title-block {
    background: var(--accent);
    color: var(--white);
}

.about-text {
    font-size: 1.2rem;
    line-height: 1.8;
}

.about-text p {
    margin-bottom: var(--spacing-md);
}

.about-text .current {
    font-size: 1.4rem;
}

.bio {
    margin-top: var(--spacing-lg);
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ================================
   PROJECTS SECTION
   ================================ */

.projects {
    background: var(--white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.project-card {
    border: 3px solid var(--black);
    transition: all var(--transition-smooth);
    cursor: pointer;
    overflow: hidden;
}

.project-card:hover {
    background: var(--black);
    color: var(--white);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.project-visual {
    aspect-ratio: 16/9;
    background: var(--gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 700;
    color: var(--white);
    transition: all var(--transition-smooth);
}

.project-card:hover .project-visual {
    background: var(--accent);
}

.project-placeholder {
    font-family: var(--font-heading);
}

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

.project-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.project-divider {
    width: 60px;
    height: 3px;
    background: var(--black);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-smooth);
}

.project-card:hover .project-divider {
    background: var(--accent);
    width: 100%;
}

.project-description {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-highlights {
    list-style: none;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.project-highlights li {
    padding-left: var(--spacing-md);
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.project-highlights li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.project-tech {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.project-tech span {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--black);
    transition: all var(--transition-fast);
}

.project-card:hover .project-tech span {
    border-color: var(--white);
}

/* ================================
   EXPERIENCE SECTION
   ================================ */

.experience {
    background: var(--white);
}

.timeline {
    margin-top: var(--spacing-xl);
    max-width: 900px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid #e0e0e0;
}

.timeline-item:last-child {
    border-bottom: none;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding-top: 0.5rem;
}

.timeline-company {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

.timeline-role {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.8;
}

.timeline-achievements {
    list-style: none;
    font-size: 1rem;
}

.timeline-achievements li {
    padding-left: var(--spacing-md);
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.timeline-achievements li::before {
    content: '━';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* ================================
   TECH STACK SECTION
   ================================ */

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

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.tech-category h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent);
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-items span {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--white);
    transition: all var(--transition-fast);
}

.tech-items span:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* ================================
   CONTACT SECTION
   ================================ */

.contact {
    background: var(--white);
}

.section-divider {
    width: 120px;
    height: 4px;
    background: var(--black);
    margin: var(--spacing-md) 0 var(--spacing-xl);
}

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

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.contact-link {
    font-size: 1.5rem;
    position: relative;
    display: inline-block;
    width: fit-content;
}

.contact-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--accent);
    transition: width var(--transition-smooth);
}

.contact-link:hover::after {
    width: 100%;
}

.download-resume {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--black);
    color: var(--white);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.05em;
    transition: all var(--transition-smooth);
    border: 3px solid var(--black);
}

.download-resume:hover {
    background: var(--white);
    color: var(--black);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* ================================
   ANIMATIONS
   ================================ */

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

@keyframes scrollMove {
    0% {
        transform: translateY(-100%);
    }
    100% {
        transform: translateY(300%);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ================================
   RESPONSIVE DESIGN
   ================================ */

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-lg) var(--spacing-md);
        min-height: auto;
    }

    .hero {
        min-height: 100vh;
    }

    .hero-title {
        font-size: clamp(3rem, 15vw, 5rem);
    }

    .hero-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .section-title {
        font-size: clamp(2.5rem, 10vw, 4rem);
    }

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

    .timeline-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .timeline-date {
        padding-top: 0;
    }

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

    .contact-link {
        font-size: 1.2rem;
    }

    .download-resume {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .hero-title {
        font-size: 3rem;
    }

    .project-card {
        border-width: 2px;
    }

    .project-visual {
        font-size: 2rem;
    }
}

/* ================================
   UTILITY CLASSES
   ================================ */

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

.bg-accent {
    background: var(--accent);
}