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

:root {
    --primary-color: #000000;
    --accent-color: #0066FF;
    --dark-bg: #0A0A0A;
    --light-bg: #FFFFFF;
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-light: #FFFFFF;
    --border-color: #E8E8E8;
    --card-bg: #FAFAFA;
    --transition: all 0.3s ease;
}

html {
    overflow-x: hidden;
}

html.lenis {
    height: auto;
}

.lenis.lenis-smooth {
    scroll-behavior: auto;
}

.lenis.lenis-smooth [data-lenis-prevent] {
    overscroll-behavior: contain;
}

.lenis.lenis-stopped {
    overflow: hidden;
}

.lenis.lenis-scrolling iframe {
    pointer-events: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--light-bg);
    overflow-x: hidden;
}

/* Scroll-triggered animations */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    width: auto;
}

.navbar .container {
    display: flex;
    align-items: center;
    gap: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border: 2px solid var(--text-primary);
    border-radius: 50px;
    padding: 8px 12px 8px 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.nav-brand {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: var(--transition);
    padding-right: 12px;
}

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

/* Three Dot Menu Button */
.menu-toggle {
    background: var(--text-primary);
    border: none;
    cursor: pointer;
    padding: 10px 12px;
    display: flex;
    gap: 5px;
    align-items: center;
    border-radius: 50px;
    transition: var(--transition);
}

.menu-toggle:hover {
    background-color: var(--accent-color);
}

.menu-toggle .dot {
    width: 5px;
    height: 5px;
    background-color: var(--text-light);
    border-radius: 50%;
    transition: var(--transition);
}

.menu-toggle.active {
    background-color: var(--accent-color);
}

/* Expandable Navigation Menu */
.nav-menu {
    position: fixed;
    top: 90px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border: 2px solid var(--text-primary);
    border-radius: 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    min-width: 200px;
}

.nav-menu.active {
    max-height: 400px;
    opacity: 1;
}

.nav-menu-content {
    padding: 16px 8px;
}

.nav-link {
    display: block;
    padding: 12px 20px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    letter-spacing: -0.02em;
    border-radius: 12px;
    margin: 4px 0;
}

.nav-link:hover {
    background-color: var(--text-primary);
    color: var(--text-light);
}

/* Hero Section */
.hero {
    padding: 140px 0 100px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background-color: var(--light-bg);
    position: relative;
    will-change: transform;
}

.hero-content {
    max-width: 900px;
    transition: transform 0.1s ease-out, opacity 0.3s ease-out;
    will-change: transform, opacity;
}

.hero-intro {
    margin-bottom: 48px;
}

.hero-greeting {
    font-size: 32px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-title-block {
    display: flex;
    align-items: baseline;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--text-primary);
}

.hero-year {
    font-size: 18px;
    font-weight: 400;
    color: var(--text-secondary);
}

.hero-description {
    font-size: 20px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 700px;
}

.hero-cta {
    display: flex;
    gap: 32px;
    align-items: center;
    flex-wrap: wrap;
}

.btn-link {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-link:hover {
    gap: 12px;
    color: var(--accent-color);
}

.btn-resume {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-light);
    background-color: var(--text-primary);
    text-decoration: none;
    padding: 12px 28px;
    border-radius: 8px;
    transition: var(--transition);
    display: inline-block;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: #0052CC;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--text-primary);
}

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

.btn-large {
    padding: 18px 48px;
    font-size: 18px;
}

/* Section Styles */
section {
    padding: 100px 0;
    position: relative;
}

section:not(.hero) {
    opacity: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-label {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
}

/* Experience Section */
.experience {
    background-color: #FFFFFF;
    padding: 120px 0;
}

.experience-list {
    max-width: 800px;
    margin: 0 auto;
}

.experience-block {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 32px;
    padding: 32px 0;
    border-bottom: 1px solid var(--border-color);
    transition: opacity 0.3s ease;
}

.experience-block:last-child {
    border-bottom: none;
}

.experience-block:hover {
    opacity: 1;
}

.experience-block:hover .experience-title {
    color: var(--accent-color);
}

.experience-block:hover .experience-company {
    color: var(--accent-color);
}

.experience-date {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding-top: 4px;
}

.experience-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.experience-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
    transition: color 0.3s ease;
}

.experience-company {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
    display: inline-block;
}

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

.experience-description {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0;
}

.experience-skills {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 8px 0 0 0;
}

.experience-skills li {
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-color);
    background-color: rgba(0, 102, 255, 0.08);
    padding: 6px 12px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.experience-skills li:hover {
    background-color: rgba(0, 102, 255, 0.15);
    transform: translateY(-2px);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.project-card {
    background-color: #FFFFFF;
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, opacity 0.8s ease-out;
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-8px) !important;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.project-image {
    width: 100%;
    height: 240px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-placeholder {
    color: var(--text-light);
    font-size: 18px;
    font-weight: 600;
}

.project-content {
    padding: 32px;
}

.project-content h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.project-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.tag {
    background-color: var(--light-bg);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.project-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.project-link:hover {
    gap: 8px;
}

/* Education Section */
.education {
    background-color: var(--light-bg);
    padding: 120px 0;
}

.education-list {
    max-width: 800px;
    margin: 0 auto;
}

.education-block {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 32px;
    padding: 32px 0;
    border-bottom: 1px solid var(--border-color);
    transition: opacity 0.3s ease;
}

.education-block:last-child {
    border-bottom: none;
}

.education-block:hover .education-title {
    color: var(--accent-color);
}

.education-block:hover .education-school {
    color: var(--accent-color);
}

.education-date {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding-top: 4px;
}

.education-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.education-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
    transition: color 0.3s ease;
}

.education-school {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
    display: inline-block;
}

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

.education-description {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0;
}

.education-highlights {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 8px 0 0 0;
}

.education-highlights li {
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-color);
    background-color: rgba(0, 102, 255, 0.08);
    padding: 6px 12px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.education-highlights li:hover {
    background-color: rgba(0, 102, 255, 0.15);
    transform: translateY(-2px);
}

/* Contact Section */
.contact {
    background-color: var(--light-bg);
    color: var(--text-primary);
}

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

.contact-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    text-align: center;
}

.contact-content p {
    font-size: 18px;
    margin-bottom: 48px;
    color: var(--text-secondary);
    text-align: center;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group textarea {
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--light-bg);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    padding: 16px 32px;
    background-color: var(--text-primary);
    color: var(--text-light);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    align-self: flex-start;
}

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

/* Footer */
.footer {
    background-color: var(--dark-bg);
    color: var(--text-light);
    padding: 60px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.social-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    font-size: 24px;
    opacity: 0.8;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-links a:hover {
    opacity: 1;
    color: var(--accent-color);
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        top: 16px;
    }

    .navbar .container {
        padding: 6px 10px 6px 16px;
    }

    .nav-brand {
        font-size: 14px;
        padding-right: 10px;
    }

    .menu-toggle {
        padding: 8px 10px;
    }

    .nav-menu {
        top: 70px;
        min-width: 180px;
    }

    .nav-link {
        font-size: 15px;
        padding: 10px 16px;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-greeting {
        font-size: 24px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-description {
        font-size: 18px;
    }

.section-title {
        font-size: 36px;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .experience-block,
    .education-block {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .experience-date,
    .education-date {
        font-size: 12px;
    }

    .experience-title,
    .education-title {
        font-size: 18px;
    }

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

@media (max-width: 480px) {
    .hero-greeting {
        font-size: 22px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-year {
        font-size: 16px;
    }

    .hero-description {
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

    .contact-content h2 {
        font-size: 32px;
    }

    .btn-submit {
        width: 100%;
        align-self: stretch;
    }
}