/* Minimal Black & White Portfolio */

:root {
    --text-primary: #000000;
    --text-secondary: #666666;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F5;
    --border-color: #E0E0E0;
    --accent-color: #000000;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* Skip Navigation */
.skip-nav {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
}

.skip-nav:focus {
    top: 0;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}

.nav-link:hover {
    opacity: 0.6;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 4rem;
    position: relative;
}

.hero-content {
    max-width: 800px;
    text-align: center;
}

.hero-greeting {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.hero-name {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero-title {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    display: inline-block;
}

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

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

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

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

.hero-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.social-link {
    color: var(--text-primary);
    width: 24px;
    height: 24px;
    transition: opacity 0.2s;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    display: inline-flex;
}

.social-link:hover {
    opacity: 0.6;
}

.social-link svg {
    width: 100%;
    height: 100%;
}

/* Container */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Sections */
section {
    padding: 5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    letter-spacing: -0.5px;
}

/* About Section */
.about-content {
    max-width: 700px;
    margin: 0 auto;
}

.about-text {
    margin-bottom: 3rem;
}

.about-text .lead {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.highlight-card {
    text-align: center;
    padding: 2rem 1rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.highlight-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.highlight-icon svg {
    width: 100%;
    height: 100%;
    stroke: var(--text-primary);
}

.highlight-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.highlight-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Experience Section */
.experience-list {
    max-width: 700px;
    margin: 0 auto;
}

.experience-item {
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
}

.experience-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.exp-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    gap: 1rem;
}

.exp-role {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.exp-company {
    display: block;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.exp-period {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.exp-highlights {
    list-style: none;
    padding-left: 0;
}

.exp-highlights li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1.25rem;
    position: relative;
}

.exp-highlights li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--text-primary);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.skill-category h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-bubble {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: transform 0.2s;
}

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

.project-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-icon svg {
    width: 100%;
    height: 100%;
    stroke: var(--text-primary);
}

.project-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.project-impact {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.project-impact .impact-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-impact .impact-value {
    font-size: 0.9rem;
    font-weight: 600;
}

/* Contact Section */
.contact {
    border-bottom: none;
}

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

.contact-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-icons {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.contact-icon {
    width: 32px;
    height: 32px;
    color: var(--text-primary);
    transition: opacity 0.2s;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    display: inline-flex;
}

.contact-icon:hover {
    opacity: 0.6;
}

.contact-icon svg {
    width: 100%;
    height: 100%;
}

/* Footer */
.footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-name {
        font-size: 2.5rem;
    }

    .hero-title {
        font-size: 1.25rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .exp-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .exp-period {
        white-space: normal;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .container {
        padding: 0 1.5rem;
    }

    section {
        padding: 3rem 0;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

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