:root {
    /* Color Palette */
    --bg-dark: #0a0a0f;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    
    /* Neon Accents */
    --accent-purple: #8a2be2;
    --accent-blue: #00d2ff;
    --accent-cyan: #00ffff;
    
    /* Glassmorphism Variables */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-highlight: rgba(255, 255, 255, 0.2);
    --neon-glow: 0 0 15px rgba(0, 210, 255, 0.4);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* Base Glassmorphism utility */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    border-color: var(--glass-highlight);
    box-shadow: var(--neon-glow);
    transform: translateY(-5px);
}

/* Background Animated Shapes */
.bg-shape {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.4;
    animation: float 20s infinite ease-in-out alternate;
}

.circle-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-purple);
    top: -10%;
    left: -10%;
}

.circle-2 {
    width: 500px;
    height: 500px;
    background: var(--accent-blue);
    bottom: -20%;
    right: -10%;
    animation-delay: -5s;
}

.circle-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-cyan);
    top: 40%;
    left: 40%;
    animation-delay: -10s;
    opacity: 0.2;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.2); }
}

/* Header & Nav */
.glass-nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(138, 43, 226, 0.3);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--accent-cyan);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* Main Layout */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem 2rem; /* offset for fixed header */
    display: flex;
    flex-direction: column;
    gap: 6rem;
}

section {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    background: linear-gradient(135deg, #fff, var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-top: -1.5rem;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    align-items: center;
    text-align: center;
}

.hero-content {
    padding: 4rem 2rem;
    max-width: 800px;
    width: 100%;
}

.greeting {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
    font-family: var(--font-heading);
}

.name {
    font-family: var(--font-heading);
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.8rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(45deg, var(--accent-purple), var(--accent-blue));
    color: #fff;
    padding: 1rem 2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 10px 20px rgba(138, 43, 226, 0.3);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(0, 210, 255, 0.5);
}

/* About Section */
.about-content {
    padding: 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.accent-icon {
    color: var(--accent-cyan);
    margin-right: 0.5rem;
    width: 24px;
    text-align: center;
}

.email-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.email-link:hover {
    color: var(--accent-cyan);
    text-decoration: underline;
}

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

.social-btn {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 1.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background: var(--glass-highlight);
    color: var(--accent-cyan);
    transform: translateY(-5px);
    box-shadow: var(--neon-glow);
    border-color: var(--accent-cyan);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    padding: 1.5rem 1rem;
    text-align: center;
    font-weight: 600;
    font-size: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: default;
}

.skill-card:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: inset 0 0 10px rgba(0, 255, 255, 0.2), var(--neon-glow);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    padding: 2rem;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.app-info {
    flex-grow: 1;
}

.free-badge {
    display: inline-block;
    background: rgba(0, 255, 136, 0.1);
    color: #00ff88;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    border: 1px solid rgba(0, 255, 136, 0.3);
}

.app-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.app-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.btn-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: auto;
}

.btn-download:hover {
    background: var(--accent-cyan);
    color: var(--bg-dark);
    box-shadow: var(--neon-glow);
}

/* Footer */
.glass-footer {
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
}

/* Animations - Intersection Observer */
.hidden {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.show {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 15, 0.95);
        backdrop-filter: blur(16px);
        padding: 2rem;
        border-bottom: 1px solid var(--glass-border);
        text-align: center;
        gap: 1.5rem;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hamburger {
        display: block;
    }
    
    .name {
        font-size: 2.8rem;
    }
    
    .tagline {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-content {
        padding: 1.5rem;
    }
}