:root {
    /* Dark Mode Colors (Default) */
    --bg-primary: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    --bg-secondary: rgba(30, 30, 30, 0.8);
    --bg-nav: rgba(20, 20, 20, 0.8);
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --accent-primary: #8a2be2;
    --accent-secondary: #da70d6;
    --border-color: rgba(138, 43, 226, 0.2);
    --shadow-color: rgba(138, 43, 226, 0.2);
}

[data-theme="light"] {
    /* Light Mode Colors */
    --bg-primary: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    --bg-secondary: rgba(255, 255, 255, 0.9);
    --bg-nav: rgba(255, 255, 255, 0.9);
    --text-primary: #212529;
    --text-secondary: #495057;
    --accent-primary: #8a2be2;
    --accent-secondary: #da70d6;
    --border-color: rgba(138, 43, 226, 0.3);
    --shadow-color: rgba(138, 43, 226, 0.15);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: all 0.3s ease;
}

/* Glassy Navigation Header */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo h2 {
    color: var(--accent-primary);
    font-weight: 700;
    font-size: 1.8rem;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-btn {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
    transition: left 0.5s ease;
}

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

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

/* Theme Toggle Button */
.theme-toggle {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    border-color: var(--accent-primary);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.theme-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.theme-toggle:active .theme-icon {
    transform: scale(0.9);
}

/* Main Content */
.main-content {
    margin-top: 100px;
    padding: 2rem;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 0;
    margin-bottom: 3rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    animation: fadeInUp 1s ease 0.2s both;
}

/* Gallery */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 0;
}

.project-card {
    background: var(--bg-secondary);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    transition: all 0.4s ease;
    position: relative;
    animation: fadeInUp 0.8s ease;
}

.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.project-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.8) 0%,
        rgba(138, 43, 226, 0.3) 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

.project-overlay h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #ffffff;
}

.project-overlay p {
    margin-bottom: 1.5rem;
    color: #cccccc;
    line-height: 1.5;
}

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

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 0.7rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    color: #ffffff;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--shadow-color);
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-buttons {
        gap: 1rem;
    }
    
    .nav-right {
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .gallery {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .nav-buttons {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
    }
}