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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Header & Navigation */
header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

header.scrolled {
    padding: 0.5rem 0;
    background-color: rgba(44, 62, 80, 0.95);
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    animation: slideInLeft 0.8s ease-out;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    animation: slideInRight 0.8s ease-out;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #3498db;
    transition: width 0.3s ease;
}

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

.nav-links a:hover {
    color: #3498db;
    transform: translateY(-2px);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.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(8px, -8px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.profile-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid white;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    margin-bottom: 2rem;
    animation: fadeInScale 0.8s ease-out;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-photo:hover {
    transform: scale(1.05) rotate(5deg);
    box-shadow: 0 12px 24px rgba(0,0,0,0.3);
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Button */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

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

.btn-secondary {
    background-color: transparent;
    border: 2px solid white;
    animation-delay: 0.7s;
}

.btn-secondary:hover {
    background-color: white;
    color: #667eea;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.btn:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 10px rgba(0,0,0,0.2);
}

/* Sections */
section {
    padding: 80px 20px;
    opacity: 0;
    animation: fadeIn 1s ease-out forwards;
}

section.visible {
    opacity: 1;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #2c3e50;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
    animation: expandWidth 0.8s ease-out;
}

@keyframes expandWidth {
    from {
        width: 0;
    }
    to {
        width: 80px;
    }
}

/* About Section */
.about {
    background-color: #f8f9fa;
}

.about p {
    text-align: center;
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
}

.about-content {
    max-width: 700px;
    margin: 0 auto 3rem;
}

.bio {
    text-align: center;
    font-size: 1.1rem;
    line-height: 2;
    margin-bottom: 1.5rem;
    color: #555;
}

.skills-title {
    text-align: center;
    font-size: 2rem;
    color: #2c3e50;
    margin: 3rem 0 1rem;
}

.skills-description {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
    animation: slideUp 0.6s ease-out forwards;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.skill-category:nth-child(1) {
    animation-delay: 0.1s;
}

.skill-category:nth-child(2) {
    animation-delay: 0.2s;
}

.skill-category:nth-child(3) {
    animation-delay: 0.3s;
}

.skill-category:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 12px 24px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.skill-category h4 {
    color: #667eea;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    text-align: center;
}

.skill-list {
    list-style: none;
    padding: 0;
}

.skill-list li {
    padding: 0.5rem 0;
    color: #555;
    font-size: 1rem;
    position: relative;
    padding-left: 1.5rem;
    opacity: 0;
    transform: translateX(-20px);
    animation: slideInLeft 0.5s ease-out forwards;
    transition: all 0.3s ease;
}

.skill-list li:nth-child(1) { animation-delay: 0.1s; }
.skill-list li:nth-child(2) { animation-delay: 0.2s; }
.skill-list li:nth-child(3) { animation-delay: 0.3s; }

.skill-list li:hover {
    color: #667eea;
    transform: translateX(5px);
    font-weight: 500;
}

.skill-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
    transition: transform 0.3s ease;
}

.skill-list li:hover:before {
    transform: scale(1.3) rotate(360deg);
}

/* Projects Section */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0,0,0,0.15);
}

.project-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.project-card p {
    margin-bottom: 1.5rem;
    color: #666;
    line-height: 1.6;
    min-height: 3em;
}

.project-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.project-btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    border: 2px solid #3498db;
}

.project-btn:hover {
    background-color: #2980b9;
    border-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.project-btn-secondary {
    background-color: transparent;
    color: #3498db;
}

.project-btn-secondary:hover {
    background-color: #3498db;
    color: white;
}

/* Contact Section */
.contact {
    background-color: #f8f9fa;
}

.contact-intro {
    text-align: center;
    font-size: 1.15rem;
    color: #555;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: white;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

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

/* Footer */
footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem;
}

.footer-availability {
    color: #3498db;
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.social-links a {
    color: white;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.social-links a::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(52, 152, 219, 0.2);
    transform: scale(0);
    transition: transform 0.3s ease;
}

.social-links a:hover::before {
    transform: scale(1.5);
}

.social-links a:hover {
    transform: translateY(-5px) rotate(5deg);
    color: #3498db;
}

.social-links svg {
    width: 28px;
    height: 28px;
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

.social-links a:hover svg {
    transform: scale(1.2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    section h2 {
        font-size: 2rem;
    }
    
    .project-grid {
        grid-template-columns: 1fr;
    }
    
    /* Hamburger Menu - Mobile */
    .hamburger {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        right: -100%;
        top: 60px;
        flex-direction: column;
        background-color: #2c3e50;
        width: 100%;
        text-align: center;
        transition: right 0.3s ease;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        gap: 0;
        padding: 2rem 0;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links li {
        padding: 1rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-links li:last-child {
        border-bottom: none;
    }
    
    .nav-links a {
        font-size: 1.2rem;
    }
}