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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
    color: #2d3748;
}

.section-subtitle {
    font-size: 1.125rem;
    color: #718096;
    text-align: center;
    margin-bottom: 3rem;
}

.section-header {
    margin-bottom: 4rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e2e8f0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo span {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #667eea;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background-color: #4a5568;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="25" cy="25" r="1" fill="%23667eea" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="%23764ba2" opacity="0.1"/></svg>');
    background-size: 100px 100px;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: 80vh;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #2d3748;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #718096;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.125rem;
    color: #4a5568;
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.hero-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: white;
    border-radius: 50%;
    color: #667eea;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    padding: 10px;
}

.social-svg {
    width: 50%;
    height: 50%;
    max-width: 30px;
    max-height: 30px;
    object-fit: contain;
    filter: brightness(0) saturate(100%) invert(45%) sepia(69%) saturate(1367%) hue-rotate(214deg) brightness(95%) contrast(91%);
    transition: all 0.3s ease;
}

.social-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.social-link:hover .social-svg {
    filter: brightness(0) saturate(100%) invert(100%) sepia(0%) saturate(7500%) hue-rotate(308deg) brightness(104%) contrast(104%);
}

/* Businessman SVG Container */
.businessman-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 600px;
}

.businessman-svg {
    max-width: 100%;
    max-height: 500px;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.1));
    animation: gentle-float 6s ease-in-out infinite;
}

@keyframes gentle-float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.floating-icon {
    position: absolute;
    width: 60px;
    height: 60px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    animation: orbit 20s linear infinite;
    padding: 8px;
}

.tech-svg {
    width: 80%;
    height: 80%;
    max-width: 44px;
    max-height: 44px;
    object-fit: contain;
}

.floating-icon[data-tech="react"] {
    top: 10%;
    right: 20%;
    animation-delay: 0s;
}

.floating-icon[data-tech="golang"] {
    top: 30%;
    left: 10%;
    animation-delay: -3s;
}

.floating-icon[data-tech="csharp"] {
    bottom: 30%;
    right: 10%;
    animation-delay: -6s;
}

.floating-icon[data-tech="typescript"] {
    bottom: 10%;
    left: 20%;
    animation-delay: -9s;
}

.floating-icon[data-tech="docker"] {
    top: 50%;
    right: 5%;
    animation-delay: -12s;
}

.floating-icon[data-tech="azure"] {
    top: 70%;
    left: 5%;
    animation-delay: -15s;
}

@keyframes orbit {
    0% { transform: rotate(0deg) translateX(100px) rotate(0deg); }
    100% { transform: rotate(360deg) translateX(100px) rotate(-360deg); }
}

/* About Section */
.about {
    padding: 100px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.125rem;
    color: #4a5568;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat {
    text-align: center;
}

.stat h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat p {
    color: #718096;
    font-weight: 500;
}

.about-img-container {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.about-bg-shape {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50% 20% 50% 20%;
    animation: morph 8s ease-in-out infinite;
}

@keyframes morph {
    0%, 100% { border-radius: 50% 20% 50% 20%; }
    50% { border-radius: 20% 50% 20% 50%; }
}

/* Skills Section */
.skills {
    padding: 100px 0;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.skills-content {
    display: grid;
    gap: 3rem;
}

.skill-category h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1.5rem;
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.skill-item {
    background: white;
    padding: 2rem 1rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.skill-item i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.skill-svg {
    width: 2.5rem;
    height: 2.5rem;
    margin-bottom: 1rem;
    object-fit: contain;
}

.skill-item span {
    font-weight: 500;
    color: #4a5568;
}

/* Experience Section */
.experience {
    padding: 100px 0;
    background: white;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: translateX(-50%);
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
    width: calc(50% - 30px);
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: calc(50% + 30px);
    text-align: left;
}

.timeline-marker {
    position: absolute;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    top: 0;
}

.timeline-item:nth-child(odd) .timeline-marker {
    right: -40px;
}

.timeline-item:nth-child(even) .timeline-marker {
    left: -40px;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    position: relative;
}

.timeline-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    font-size: 1rem;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.timeline-date {
    font-size: 0.875rem;
    color: #718096;
    font-weight: 500;
    margin-bottom: 1rem;
    display: block;
}

.timeline-content p {
    color: #4a5568;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Portfolio Section */
.portfolio {
    padding: 100px 0;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

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

.portfolio-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.portfolio-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-links {
    display: flex;
    gap: 1rem;
}

.portfolio-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: white;
    color: #667eea;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
}

.portfolio-link:hover {
    transform: scale(1.1);
}

.portfolio-content {
    padding: 1.5rem;
}

.portfolio-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.portfolio-content p {
    color: #4a5568;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.portfolio-image.wikigo {
    background: url('images/wikigo.png') no-repeat center center;
    background-size: cover;
}

.portfolio-image.jsrunner {
    background: url('images/jsrunner.png') no-repeat center center;
    background-size: cover;
}

.portfolio-image.mobileapp {
    background: url('images/vwcapp.png') no-repeat center center;
    background-size: cover;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.contact-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: #4a5568;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
    background: #f7fafc;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    background: white;
}

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

/* Footer */
.footer {
    background: #2d3748;
    color: white;
    padding: 2rem 0;
}

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

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer .social-link {
    background: #4a5568;
    color: white;
}

.footer .social-link .social-svg {
    filter: brightness(0) saturate(100%) invert(100%) sepia(0%) saturate(7500%) hue-rotate(308deg) brightness(104%) contrast(104%);
}

.footer .social-link:hover {
    background: #667eea;
}

.footer .social-link:hover .social-svg {
    filter: brightness(0) saturate(100%) invert(100%) sepia(0%) saturate(7500%) hue-rotate(308deg) brightness(104%) contrast(104%);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

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

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

    .hero {
        min-height: 100vh;
        padding: 80px 20px 40px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
        min-height: auto;
    }

    .hero-image {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
        line-height: 1.1;
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    .hero-description {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }

    .hero-social {
        justify-content: center;
    }

    .businessman-container {
        height: 400px;
    }

    .floating-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-image {
        display: none;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: calc(100% - 50px);
        left: 50px !important;
        text-align: left !important;
    }

    .timeline-item .timeline-marker {
        left: -30px !important;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 80px 15px 30px;
    }

    .hero-title {
        font-size: 2rem;
        margin-bottom: 0.75rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
        margin-bottom: 0.75rem;
    }

    .hero-description {
        font-size: 0.95rem;
        margin-bottom: 1.25rem;
        line-height: 1.6;
    }

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

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }

    .btn {
        width: 100%;
        max-width: 250px;
    }

    .nav-container {
        padding: 0 15px;
    }

    .container {
        padding: 0 15px;
    }
}