/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dark: #1e293b;
    
    --bg-primary: #223B34;
    --bg-secondary: #2a4a42;
    --bg-light: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.1);
    
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.preloader-content {
    text-align: center;
    color: var(--text-primary);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Navigation */
.navbar {
    background: rgba(34, 59, 52, 0.95);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    padding: 1rem 0;
}

.navbar.scrolled {
    background: rgba(34, 59, 52, 1);
    box-shadow: var(--shadow);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary) !important;
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color) !important;
}

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

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

/* Hero Section */
.hero-section {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 40%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

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

.hero-buttons {
    margin-top: 2rem;
}

.hero-image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.hero-image img:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

/* Section Styles */
section {
    padding: 100px 0;
}

.about-section {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.skills-section {
    background: transparent;
}

.projects-section {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.services-section {
    background: transparent;
}

.testimonials-section {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.contact-section {
    background: transparent;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about-content {
    padding-left: 2rem;
}

.about-image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.stat-card {
    text-align: center;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

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

.stat-card h4 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* Skills Section */
.skill-category {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    height: 100%;
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.skill-category h4 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

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

.skill-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.skill-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.skill-icon {
    font-size: 1.5rem;
    margin-right: 0.75rem;
}

.skill-item span {
    font-weight: 500;
    color: var(--text-secondary);
}

/* Projects Section */
.project-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    height: 100%;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.project-image {
    position: relative;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-content {
    padding: 1.5rem;
}

.project-content h5 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

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

.tech-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Services Section */
.service-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    height: 100%;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.service-card ul {
    list-style: none;
    padding: 0;
    text-align: left;
}

.service-card li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

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

/* Testimonials Section */
.testimonial-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    height: 100%;
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.stars {
    color: #fbbf24;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.testimonial-content p {
    color: var(--text-secondary);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-image {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 1rem;
    object-fit: cover;
}

.author-info h6 {
    margin: 0;
    color: var(--text-primary);
}

.author-info span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Contact Section */
.contact-form-wrapper {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-control {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.form-control:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
    color: var(--text-primary);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.contact-info {
    text-align: center;
    margin-bottom: 2rem;
}

.contact-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-info h5 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.contact-info p {
    color: var(--text-muted);
    margin: 0;
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    justify-content: end;
    gap: 1rem;
}

.social-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary-color);
}
/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--primary-color);
    color: var(--text-primary);
    border: none;
    border-radius: 50%;
    padding: 12px;
    box-shadow: var(--shadow);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    z-index: 999;
    transition: var(--transition);
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    box-shadow: var(--shadow-hover);
}

.back-to-top svg {
    stroke: var(--text-primary);
}

/* Show button when scrolled */
.back-to-top.show {
    opacity: 1;
    visibility: visible;
}


/* Buttons */
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 0.75rem 2rem;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
}

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

.btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-content {
        padding-left: 0;
        margin-top: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .social-links {
        justify-content: center;
        margin-top: 1rem;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 576px) {
    .hero-buttons {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
}

.fade-in.animated {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.8s ease;
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
}

.slide-in-left.animated {
    opacity: 1;
    transform: translateX(0);
    transition: all 0.8s ease;
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
}

.slide-in-right.animated {
    opacity: 1;
    transform: translateX(0);
    transition: all 0.8s ease;
}

.scale-in {
    opacity: 0;
    transform: scale(0.8);
}

.scale-in.animated {
    opacity: 1;
    transform: scale(1);
    transition: all 0.8s ease;
}