/* ========================================
   CSS Variables & Theme
   ======================================== */
:root {
    /* Light Mode */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #eeeeee;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --accent-primary: #6366f1;
    --accent-secondary: #ec4899;
    --accent-hover: #4f46e5;
    --border-color: #e5e5e5;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-tertiary: #3a3a3a;
    --text-primary: #f5f5f5;
    --text-secondary: #d0d0d0;
    --text-tertiary: #a0a0a0;
    --border-color: #444444;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    transition: var(--transition);
}

/* ========================================
   Navigation Bar
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: var(--transition);
}

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

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-primary);
}

.logo-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-2xl);
}

.nav-link {
    position: relative;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

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

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1.2rem;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
}

.language-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
}

.hamburger {
    display: none;
    flex-direction: column;
    width: 25px;
    height: 20px;
}

.hamburger span {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    margin-top: 70px;
    padding: var(--spacing-3xl) 0;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
}

.hero .container {
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.btn {
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
}

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

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

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

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

.social-links {
    display: flex;
    gap: var(--spacing-lg);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1.3rem;
}

.social-link:hover {
    background-color: var(--accent-primary);
    color: white;
    transform: translateY(-3px);
}

.avatar-placeholder {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 100px;
    color: rgba(255, 255, 255, 0.3);
}

/* ========================================
   About Section
   ======================================== */
.about {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-2xl);
    text-align: center;
    color: var(--text-primary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--border-color);
}

.stat {
    text-align: center;
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.stat p {
    color: var(--text-secondary);
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 100%;
    max-width: 350px;
    aspect-ratio: 1;
    border-radius: var(--radius-xl);
    background-color: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: var(--text-tertiary);
}

/* ========================================
   Skills Section
   ======================================== */
.skills {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.skill-category {
    background-color: var(--bg-secondary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xl);
    color: var(--accent-primary);
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skill-item span {
    font-weight: 600;
    color: var(--text-primary);
}

.skill-bar {
    width: 100%;
    height: 8px;
    border-radius: 10px;
    background-color: var(--bg-tertiary);
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: width 0.5s ease;
}

/* ========================================
   Projects Section
   ======================================== */
.projects {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
}

.project-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.project-image {
    width: 100%;
    height: 200px;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.image-placeholder-small {
    font-size: 60px;
    color: var(--accent-primary);
}

.project-content {
    padding: var(--spacing-xl);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.tech-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--bg-secondary);
    color: var(--accent-primary);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
}

.project-link {
    color: var(--accent-primary);
    font-weight: 600;
    display: inline-block;
}

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

/* ========================================
   Contact Section
   ======================================== */
.contact {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-primary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-size: 1.05rem;
}

.contact-details {
    margin-bottom: var(--spacing-2xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--accent-primary);
    min-width: 30px;
}

.contact-item h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.contact-item p {
    margin: 0;
    color: var(--text-secondary);
}

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

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

.social-links-large {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

.social-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    font-weight: 600;
}

.social-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.contact-form {
    background-color: var(--bg-secondary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

.btn-submit {
    width: 100%;
    margin-top: var(--spacing-md);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--bg-secondary);
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-color);
}

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

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-link {
    color: var(--text-secondary);
}

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

/* ========================================
   Scroll to Top Button
   ======================================== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--accent-primary);
    color: white;
    font-size: 1.2rem;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    transition: var(--transition);
}

.scroll-to-top.show {
    display: flex;
    opacity: 1;
}

.scroll-to-top:hover {
    background-color: var(--accent-hover);
    transform: translateY(-3px);
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 2.2rem;
    }

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

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .nav-menu {
        gap: var(--spacing-xl);
    }
}

/* Mobile (480px - 768px) */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
    }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
    }

    .hero {
        margin-top: 60px;
        padding: var(--spacing-2xl) 0;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

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

    .btn {
        width: 100%;
        text-align: center;
    }

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

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

    .contact-details {
        margin-bottom: var(--spacing-lg);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* Small Mobile (320px - 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .nav-controls {
        gap: var(--spacing-sm);
    }

    .language-select {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }

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

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

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

    .hero-buttons {
        gap: var(--spacing-md);
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-xl);
    }

    .social-links {
        gap: var(--spacing-md);
    }

    .social-link {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    .skill-category {
        padding: var(--spacing-lg);
    }

    .stat h3 {
        font-size: 1.8rem;
    }

    .project-card {
        margin: 0;
    }

    .project-image {
        height: 150px;
    }

    .image-placeholder-small {
        font-size: 45px;
    }

    .contact-form {
        padding: var(--spacing-lg);
    }

    .form-input {
        padding: var(--spacing-sm);
        font-size: 0.95rem;
    }

    .avatar-placeholder {
        font-size: 70px;
    }

    .image-placeholder {
        font-size: 60px;
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.project-card {
    animation: slideInUp 0.6s ease-out;
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
    text-align: center;
}
.hero-image img{
    width: 500px;
    height: 500px;
    border-radius: 50px;
} 

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

.text-secondary {
    color: var(--text-secondary);
}

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

.bg-secondary {
    background-color: var(--bg-secondary);
}