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

:root {
    /* Light Theme Colors */
    --primary-color: #2c3e50;
    --secondary-color: #16a085;
    --accent-color: #3498db;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #ecf0f1;
    --border-color: #e9ecef;
    --shadow: rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #2c3e50 0%, #16a085 100%);
    --gradient-secondary: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

[data-theme="dark"] {
    --primary-color: #3498db;
    --secondary-color: #1abc9c;
    --accent-color: #e74c3c;
    --text-primary: #ecf0f1;
    --text-secondary: #bdc3c7;
    --bg-primary: #1a1a1a;
    --bg-secondary: #2c2c2c;
    --bg-tertiary: #3a3a3a;
    --border-color: #4a4a4a;
    --shadow: rgba(0, 0, 0, 0.3);
    --gradient-primary: linear-gradient(135deg, #3498db 0%, #1abc9c 100%);
    --gradient-secondary: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all var(--transition-medium);
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px var(--shadow);
    z-index: 1000;
    transition: all var(--transition-medium);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 2px;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    background: var(--gradient-primary);
    transition: all var(--transition-medium);
    transform: translateX(-50%);
}

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

.theme-toggle {
    background: var(--gradient-primary);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-medium);
    box-shadow: 0 4px 15px var(--shadow);
}

.theme-toggle:hover {
    transform: rotate(180deg) scale(1.1);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition-medium);
    border-radius: 2px;
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(52, 152, 219, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(22, 160, 133, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-sm);
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero-image {
    margin-bottom: var(--spacing-md);
    position: relative;
}

.image-placeholder {
    width: 200px;
    height: 200px;
    background: var(--gradient-primary);
    border-radius: 50%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    box-shadow: 0 20px 60px var(--shadow);
    position: relative;
    overflow: hidden;
    animation: profilePulse 3s ease-in-out infinite;
}
.profile-photo {
    width: 95%;
    height: 95%;
    object-fit:cover ;
    border-radius: 50%;
    display: block;
}

@keyframes profilePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.image-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.hero-name {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: slideInUp 1s ease;
}

.hero-title {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    animation: slideInUp 1s ease 0.2s both;
}

.hero-location {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    animation: slideInUp 1s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    animation: slideInUp 1s ease 0.6s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 8px 25px var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px var(--shadow);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--shadow);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    animation: slideInUp 1s ease 0.8s both;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    color: var(--primary-color);
    border-radius: 50%;
    text-decoration: none;
    font-size: 1.2rem;
    transition: all var(--transition-medium);
    box-shadow: 0 4px 15px var(--shadow);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-3px) scale(1.1);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid var(--primary-color);
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
}

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

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

/* Section Styles */
.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    color: var(--text-primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.about-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.detail-item {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 25px var(--shadow);
    transition: all var(--transition-medium);
}

.detail-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow);
}

.detail-item h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

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

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.skill-category {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 25px var(--shadow);
    transition: all var(--transition-medium);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow);
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.skill-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-badge {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-medium);
    cursor: default;
}

.skill-badge:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px var(--shadow);
}

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

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
}

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

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: var(--spacing-md);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: var(--spacing-md);
}

.timeline-date {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    box-shadow: 0 4px 15px var(--shadow);
}

.timeline-content {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 25px var(--shadow);
    flex: 1;
    transition: all var(--transition-medium);
    position: relative;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow);
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border: 10px solid transparent;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -20px;
    border-left-color: var(--bg-primary);
    transform: translateY(-50%);
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -20px;
    border-right-color: var(--bg-primary);
    transform: translateY(-50%);
}

.timeline-content h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.timeline-content h4 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
}

.timeline-content li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: var(--spacing-sm);
}

.timeline-content li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-size: 0.8rem;
}

/* Education Section */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.education-item {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 25px var(--shadow);
    display: flex;
    gap: var(--spacing-sm);
    transition: all var(--transition-medium);
}

.education-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow);
}

.education-icon {
    background: var(--gradient-primary);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.education-content h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.education-content h4 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.education-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.education-content ul {
    list-style: none;
    padding: 0;
}

.education-content li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: var(--spacing-sm);
}

.education-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* References Section */
.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.reference-item {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 25px var(--shadow);
    transition: all var(--transition-medium);
    text-align: center;
}

.reference-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow);
}

.reference-info h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.reference-title {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.reference-contact p {
    color: var(--text-secondary);
    margin: var(--spacing-xs) 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 15px var(--shadow);
    transition: all var(--transition-medium);
}

.contact-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow);
}

.contact-item i {
    background: var(--gradient-primary);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item h4 {
    color: var(--primary-color);
    margin: 0;
    font-weight: 600;
}

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

/* Contact Form */
.contact-form {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 25px var(--shadow);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 12px 12px 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-medium);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group label {
    position: absolute;
    top: 16px;
    left: 12px;
    color: var(--text-secondary);
    font-size: 1rem;
    pointer-events: none;
    transition: all var(--transition-medium);
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label {
    top: 4px;
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 500;
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-content p {
    color: var(--text-secondary);
    margin: 0;
}

.footer-social {
    display: flex;
    gap: var(--spacing-xs);
}

.footer-social .social-link {
    width: 35px;
    height: 35px;
    font-size: 1rem;
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease;
}

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

.slide-in-left {
    animation: slideInLeft 1s ease;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 1s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-lg);
        transition: left var(--transition-medium);
        backdrop-filter: blur(20px);
        box-shadow: 0 8px 25px var(--shadow);
    }

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

    .nav-link {
        font-size: 1.2rem;
        margin: var(--spacing-sm) 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

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

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

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

    .btn {
        width: 200px;
        justify-content: center;
    }

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

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
        text-align: left !important;
    }

    .timeline-item .timeline-content {
        margin-left: var(--spacing-lg) !important;
        margin-right: 0 !important;
    }

    .timeline-content::before {
        left: -20px !important;
        border-right-color: var(--bg-primary) !important;
        border-left-color: transparent !important;
    }

    .timeline-date {
        position: absolute;
        left: 0;
        transform: rotate(-90deg);
        transform-origin: center;
        white-space: nowrap;
        font-size: 0.8rem;
    }

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

    .education-grid,
    .references-grid {
        grid-template-columns: 1fr;
    }

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

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

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

    .image-placeholder {
        width: 150px;
        height: 150px;
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xs: 0.4rem;
        --spacing-sm: 0.8rem;
        --spacing-md: 1.5rem;
        --spacing-lg: 2.5rem;
        --spacing-xl: 3rem;
    }

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

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

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

    .education-item {
        flex-direction: column;
        text-align: center;
    }

    .education-icon {
        align-self: center;
    }
}