/* CSS Custom Properties for Dark Blue Theme */
:root {
    --primary-color: #0f1729;
    --secondary-color: #1a2238;
    --accent-color: #3b82f6;
    --text-primary: #ffffff;
    --text-secondary: #b3c5d1;
    --text-muted: #8194a3;
    --background-dark: #0a0f1c;
    --background-light: #152238;
    --border-color: #2d3748;
    --gradient-primary: linear-gradient(135deg, #0f1729 0%, #1a2238 100%);
    --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --shadow-light: 0 4px 6px rgba(59, 130, 246, 0.1);
    --shadow-medium: 0 10px 25px rgba(59, 130, 246, 0.15);
    --shadow-heavy: 0 20px 40px rgba(59, 130, 246, 0.2);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 41, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    background: rgba(15, 23, 41, 0.98);
    box-shadow: var(--shadow-medium);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    transition: var(--transition-smooth);
}

.nav-logo a:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

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

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-smooth);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: slideInLeft 1s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.typing-text {
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    animation: typing 3s steps(20) 1s both;
}

.typing-text::after {
    content: '|';
    position: absolute;
    right: 0;
    color: var(--accent-color);
    animation: blink 1s infinite;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2.5rem;
    max-width: 500px;
}

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

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: var(--transition-bounce);
    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, 0.1), transparent);
    transition: var(--transition-smooth);
}

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

.btn-primary {
    background: var(--gradient-accent);
    color: var(--text-primary);
    box-shadow: var(--shadow-light);
}

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

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

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

.hero-image {
    display: flex;
    justify-content: center;
    animation: slideInRight 1s ease-out;
}

.profile-container {
    position: relative;
    width: 300px;
    height: 300px;
}

.profile-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-accent);
    border-radius: 50%;
    opacity: 0.1;
    animation: pulse 3s ease-in-out infinite;
}

.profile-icon {
    width: 100%;
    height: 100%;
    animation: float 6s ease-in-out infinite;
}

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

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
    transform: rotate(45deg);
}

/* Section Styles */
section {
    padding: 5rem 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

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

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

.about-text h3 {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(59, 130, 246, 0.05);
    border-radius: 10px;
    border-left: 3px solid var(--accent-color);
    transition: var(--transition-smooth);
}

.highlight-item:hover {
    transform: translateX(10px);
    background: rgba(59, 130, 246, 0.1);
}

.highlight-icon {
    width: 24px;
    height: 24px;
    color: var(--accent-color);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--background-light);
    border-radius: 15px;
    box-shadow: var(--shadow-light);
    transition: var(--transition-smooth);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Skills Section */
.skills-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.skills-category {
    margin-bottom: 2rem;
}

.skills-category h3 {
    color: var(--accent-color);
    margin-bottom: 2rem;
    text-align: center;
}

.skill-item {
    margin-bottom: 2rem;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.skill-name {
    font-weight: 600;
}

.skill-percentage {
    color: var(--accent-color);
    font-weight: 600;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: var(--background-light);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-accent);
    border-radius: 4px;
    width: 0;
    transition: width 2s ease-out;
    position: relative;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 2s infinite;
}

.skills-tools {
    grid-column: 1 / -1;
    margin-top: 2rem;
}

.skills-tools h3 {
    color: var(--accent-color);
    text-align: center;
    margin-bottom: 2rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.tool-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--background-light);
    border-radius: 12px;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.tool-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-color);
}

.tool-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-color);
}

/* Portfolio Section */
.portfolio {
    background: var(--secondary-color);
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: rgba(59, 130, 246, 0.1);
}

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

.portfolio-item {
    background: var(--background-light);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
}

.portfolio-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    background: var(--background-dark);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-placeholder svg {
    width: 100%;
    height: 100%;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(59, 130, 246, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-smooth);
}

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

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

.portfolio-link {
    width: 50px;
    height: 50px;
    background: var(--text-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    transition: var(--transition-bounce);
}

.portfolio-link:hover {
    transform: scale(1.1);
    background: var(--accent-color);
    color: var(--text-primary);
}

.portfolio-link svg {
    width: 20px;
    height: 20px;
}

.portfolio-content {
    padding: 1.5rem;
}

.portfolio-title {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.portfolio-description {
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

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

.tech-tag {
    padding: 0.25rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    border-radius: 15px;
    font-size: 0.8rem;
    border: 1px solid var(--accent-color);
}

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

.contact-info h3 {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.contact-methods {
    margin: 2rem 0;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.contact-icon {
    width: 24px;
    height: 24px;
    color: var(--accent-color);
}

.contact-details {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.contact-value {
    font-weight: 600;
    color: var(--text-primary);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

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

.social-link svg {
    width: 20px;
    height: 20px;
}

/* Contact Form */
.contact-form {
    background: var(--background-light);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background: var(--background-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* Footer */
.footer {
    background: var(--background-dark);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content p {
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

/* Animations */
@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);
    }
}

@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

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

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

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .skills-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--primary-color);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: var(--transition-smooth);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .profile-container {
        width: 250px;
        height: 250px;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    section {
        padding: 3rem 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .portfolio-filter {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.4rem 1rem;
        font-size: 0.9rem;
    }
}

/* Animation utilities */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-smooth);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.portfolio-item {
    opacity: 0;
    transform: scale(0.8);
    transition: var(--transition-smooth);
}

.portfolio-item.visible {
    opacity: 1;
    transform: scale(1);
}

.portfolio-item.hidden {
    display: none;
}