@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@100;200;300;400;500;600;700;800;900&display=swap');

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

:root {
    --primary-bg: #FFFFFF;
    --secondary-bg: #F8F9FA;
    --tertiary-bg: #F3F4F6;
    --dark-bg: #1A1A1A;
    --text-primary: #1A1A1A;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --border-color: #E5E7EB;
    --accent-color: #000000;
    --hover-color: #374151;
    --success-color: #10B981;
    --font-main: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --section-padding: 100px;
    --container-padding: 20px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    background: var(--primary-bg);
    font-weight: 400;
}

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

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem var(--container-padding);
}

.nav-brand {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.3s ease;
    position: relative;
    letter-spacing: 0.3px;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

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

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

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

.hero {
    padding: 140px 0 100px;
    background: var(--secondary-bg);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
}

.hero-label {
    font-size: 0.75rem;
    letter-spacing: 3px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 300;
    line-height: 1.3;
    margin-bottom: 2rem;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    padding: 14px 32px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 400;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

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

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

.hero-info {
    display: flex;
    gap: 2.5rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.info-item svg {
    color: var(--text-primary);
    width: 18px;
    height: 18px;
}

.hero-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    filter: grayscale(100%);
    transition: filter 0.4s ease;
}

.image-wrapper:hover img {
    filter: grayscale(0%);
}

.image-badge {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: white;
    padding: 12px 24px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    letter-spacing: 0.3px;
}

.image-badge svg {
    color: var(--success-color);
    width: 18px;
    height: 18px;
}

.about {
    padding: var(--section-padding) 0;
    background: var(--primary-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    font-size: 0.75rem;
    letter-spacing: 3px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--text-primary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.4;
    letter-spacing: -0.5px;
}

.section-description {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 1.5rem auto 0;
    font-weight: 300;
    line-height: 1.8;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-content p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.9;
    font-weight: 300;
}

.about-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2.5rem;
}

.about-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px;
    background: var(--secondary-bg);
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
    border-color: var(--border-color);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: white;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.feature-icon svg {
    color: var(--text-primary);
    width: 22px;
    height: 22px;
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: -0.3px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 300;
    line-height: 1.7;
}

.timeline-section {
    padding: var(--section-padding) 0;
    background: var(--secondary-bg);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 60px;
}

.timeline-dot {
    position: absolute;
    left: -5px;
    top: 0;
    width: 11px;
    height: 11px;
    background: var(--accent-color);
    border-radius: 50%;
    border: 3px solid var(--secondary-bg);
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 0.8rem;
    letter-spacing: 0.5px;
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: -0.3px;
}

.timeline-company {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 1.2rem;
}

.timeline-content ul {
    margin-top: 1rem;
    padding-left: 20px;
}

.timeline-content li {
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    line-height: 1.8;
    font-weight: 300;
}

.projects {
    padding: var(--section-padding) 0;
    background: var(--primary-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.project-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--text-light);
}

.project-image {
    background: var(--secondary-bg);
    height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border-color);
}

.project-placeholder {
    color: var(--text-light);
}

.project-content {
    padding: 36px;
}

.project-content h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: -0.3px;
}

.project-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-content > p {
    color: var(--text-secondary);
    margin-bottom: 1.8rem;
    line-height: 1.8;
    font-weight: 300;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.project-tags span {
    padding: 6px 16px;
    background: var(--secondary-bg);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
    border: 1px solid var(--border-color);
    letter-spacing: 0.3px;
}

.skills {
    padding: var(--section-padding) 0;
    background: var(--secondary-bg);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

.skill-category {
    background: white;
    padding: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.2rem;
}

.skill-header h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: -0.3px;
}

.skill-level {
    padding: 4px 14px;
    background: var(--secondary-bg);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 400;
    border: 1px solid var(--border-color);
    letter-spacing: 0.5px;
}

.skill-category > p {
    color: var(--text-secondary);
    margin-bottom: 1.8rem;
    line-height: 1.8;
    font-weight: 300;
}

.skill-bar {
    width: 100%;
    height: 6px;
    background: var(--secondary-bg);
    border-radius: 10px;
    margin-bottom: 1.8rem;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--accent-color);
    border-radius: 10px;
    transition: width 1s ease;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tags span {
    padding: 6px 16px;
    background: var(--secondary-bg);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
    border: 1px solid var(--border-color);
    letter-spacing: 0.3px;
}

.toolbox {
    background: white;
    padding: 48px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.toolbox h3 {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: -0.3px;
}

.toolbox ul {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    list-style: none;
}

.toolbox li {
    color: var(--text-secondary);
    padding-left: 28px;
    position: relative;
    line-height: 1.8;
    font-weight: 300;
}

.toolbox li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.contact {
    padding: var(--section-padding) 0;
    background: var(--primary-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 300;
    letter-spacing: -0.5px;
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.9;
    font-weight: 300;
}

.contact-details {
    margin-bottom: 3.5rem;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 2.5rem;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--secondary-bg);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.contact-icon svg {
    color: var(--text-primary);
    width: 20px;
    height: 20px;
}

.contact-item h4 {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 500;
}

.contact-item p {
    color: var(--text-primary);
    font-weight: 400;
}

.contact-item a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--hover-color);
}

.social-links h4 {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 500;
}

.social-icons {
    display: flex;
    gap: 12px;
}

.social-icons a {
    width: 48px;
    height: 48px;
    background: var(--secondary-bg);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.social-icons a:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
    border-color: var(--accent-color);
}

.social-icons a:hover svg {
    color: white;
}

.social-icons svg {
    color: var(--text-primary);
    transition: color 0.3s ease;
    width: 20px;
    height: 20px;
}

.contact-form {
    background: var(--secondary-bg);
    padding: 48px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    margin-bottom: 1.8rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--font-main);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background: white;
    color: var(--text-primary);
    font-weight: 300;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.05);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.form-message {
    background: var(--secondary-bg);
    padding: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 24px;
    border: 1px solid var(--border-color);
}

.success-message {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.05);
}

.success-message svg {
    color: var(--success-color);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
}

.form-message h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-message p {
    color: var(--text-secondary);
    margin: 0;
    font-weight: 300;
}

.footer {
    padding: 48px 0;
    background: var(--dark-bg);
    color: white;
    text-align: center;
}

.footer-content p {
    margin: 0.5rem 0;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 300;
    font-size: 0.9rem;
}

@media (max-width: 968px) {
    :root {
        --section-padding: 80px;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        border-top: 1px solid var(--border-color);
    }

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

    .hamburger {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

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

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

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .toolbox ul {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    :root {
        --section-padding: 60px;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

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

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

    .hero-info {
        flex-direction: column;
        gap: 1rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .timeline-item {
        padding-left: 40px;
    }

    .contact-form {
        padding: 32px;
    }

    .toolbox {
        padding: 32px;
    }

    .skill-category {
        padding: 28px;
    }

    .project-content {
        padding: 28px;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.hero-image {
    animation: fadeInUp 0.8s ease-out;
}

section {
    scroll-margin-top: 80px;
}

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

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