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

:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #1f2937;
    --text-light: #6b7280;
    --text-dark: #111827;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --navbar-bg: rgba(255, 255, 255, 0.95);
    --navbar-scrolled: rgba(255, 255, 255, 0.98);
    --navbar-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --primary-color: #22c55e;
    --primary-dark: #16a34a;
    --secondary-color: #111827;
    --text-light: #d1d5db;
    --text-dark: #f9fafb;
    --bg-light: #111827;
    --white: #1f2937;
    --border-color: #374151;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    --navbar-bg: rgba(17, 24, 39, 0.95);
    --navbar-scrolled: rgba(0, 0, 0, 0.98);
    --navbar-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    background-color: var(--bg-light);
    transition: var(--transition);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: var(--navbar-scrolled);
    box-shadow: var(--navbar-shadow);
}

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

.nav-logo span {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.nav-link.active {
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-admin {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

.btn-admin:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
    background: linear-gradient(135deg, #7c3aed, #6d28d9);
}

[data-theme="dark"] .btn-admin {
    background: linear-gradient(135deg, #10b981, #059669);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

[data-theme="dark"] .btn-admin:hover {
    background: linear-gradient(135deg, #059669, #047857);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--border-color) 100%);
    text-align: center;
    position: relative;
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 2rem;
    color: var(--text-light);
    margin-bottom: 1rem;
    font-weight: 400;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

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

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-light);
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-light);
    border-bottom: 2px solid var(--text-light);
    transform: rotate(45deg);
    margin: 10px auto;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) rotate(45deg);
    }
    40% {
        transform: translateY(-10px) rotate(45deg);
    }
    60% {
        transform: translateY(-5px) rotate(45deg);
    }
}

/* Section Styling */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
    color: var(--text-dark);
}

/* About Section */
.about {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
}

.stat i {
    color: var(--primary-color);
}

/* Skills Section */
.skills {
    background: var(--bg-light);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    font-size: 1.3rem;
}

.skill-category i {
    color: var(--primary-color);
    font-size: 1.4rem;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.skill-tag {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Timeline Section */
.timeline-section {
    background: var(--white);
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-date {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    white-space: nowrap;
}

.timeline-content {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin: 0 2rem;
    flex: 1;
}

.timeline-content h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.timeline-type {
    background: var(--bg-light);
    color: var(--text-light);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
}

/* Projects Section */
.projects {
    background: var(--bg-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.project-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: fit-content;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    height: 180px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: 1.2rem;
}

.project-content h3 {
    margin-bottom: 0.8rem;
    color: var(--text-dark);
    font-size: 1.1rem;
    font-weight: 600;
}

.project-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.5;
    font-size: 0.9rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.project-tags span {
    background: var(--bg-light);
    color: var(--text-light);
    padding: 0.3rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.project-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.project-link:hover {
    color: var(--primary-dark);
}

.project-link::after {
    content: '→';
    transition: var(--transition);
}

.project-link:hover::after {
    transform: translateX(3px);
}

/* Contact Section */
.contact {
    background: var(--white);
    padding: 5rem 0;
}

.contact-content {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 350px;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 40px;
    text-align: center;
}

.contact-item div {
    flex: 1;
    text-align: left;
}

.contact-item h3 {
    margin-bottom: 0.3rem;
    color: var(--text-dark);
    font-size: 1rem;
    font-weight: 600;
}

.contact-item p {
    color: var(--text-light);
    margin: 0;
    font-size: 0.9rem;
}

.email-copy {
    cursor: pointer;
    transition: var(--transition);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.email-copy:hover {
    background: var(--primary-color);
    color: var(--white) !important;
}

/* Footer */
.footer {
    background: var(--secondary-color);
    color: var(--text-light);
    text-align: center;
    padding: 2rem 0;
}

/* Experience Section */
.experience {
    background: var(--white);
    padding: 5rem 0;
}

.experience-grid {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.experience-card {
    background: var(--bg-light);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--primary-color);
}

.experience-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.experience-company h3 {
    color: var(--text-dark);
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.company-name {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1rem;
}

.experience-period {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.experience-description {
    margin-bottom: 1.5rem;
}

.experience-description p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.experience-achievements {
    list-style: none;
    margin-bottom: 1.5rem;
}

.experience-achievements li {
    color: var(--text-light);
    padding: 0.4rem 0;
    position: relative;
    padding-left: 1.5rem;
    line-height: 1.5;
}

.experience-achievements li::before {
    content: '▸';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
    top: 0.4rem;
}

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

.experience-tech span {
    background: var(--white);
    color: var(--text-light);
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.experience-tech span:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

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

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

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

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

    .hero-subtitle {
        font-size: 1.5rem;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-stats {
        justify-content: center;
    }

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

    .timeline-item {
        flex-direction: column !important;
        align-items: flex-start;
        padding-left: 50px;
    }

    .timeline-content {
        margin: 1rem 0;
    }

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

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

    .experience-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .experience-period {
        align-self: flex-start;
    }
    
    .experience-tech {
        justify-content: flex-start;
    }
    
    .experience-card {
        padding: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-actions {
        order: 3;
        gap: 0.5rem;
    }
    
    .btn-admin {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    section {
        padding: 3rem 0;
    }

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

    .projects-container {
        margin: 0 50px;
    }
    
    .project-card {
        min-width: 250px;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .experience-card {
        padding: 1.5rem;
    }
    
    .experience-company h3 {
        font-size: 1.2rem;
    }
    
    .experience-period {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .btn-admin {
        padding: 0.3rem 0.6rem;
        font-size: 0.75rem;
    }
    
    .btn-admin i {
        font-size: 0.8rem;
    }
    
    .theme-toggle {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
    
    .contact-item {
        padding: 1rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

.theme-toggle {
    background: none;
    border: 2px solid var(--text-light);
    color: var(--text-dark);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    transform: scale(1.1);
}