:root {
    --bg-color: #000000;
    --text-primary: #ffffff;
    --text-secondary: #a1a1a6;
    --card-bg: rgba(28, 28, 30, 0.5);
    --card-border: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(0, 0, 0, 0.7);
    --accent: #2997ff;
    --accent-hover: #147ce5;
    
    --gradient-1: linear-gradient(135deg, #ff2e93, #ff8000);
    --gradient-2: linear-gradient(135deg, #00c6ff, #0072ff);
    --gradient-3: linear-gradient(135deg, #f5af19, #f12711);
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Typography */
h1, h2, h3 {
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(90deg, #fff, #a1a1a6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Utilities */
.mt-4 { margin-top: 1rem; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background-color: var(--glass-bg);
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: center;
    transition: transform 0.3s ease;
}

.nav-content {
    width: 100%;
    max-width: 1200px;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.github-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.github-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-color);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80vw;
    height: 80vw;
    max-width: 800px;
    max-height: 800px;
    background: radial-gradient(circle, rgba(41,151,255,0.15) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    border-radius: 50%;
    filter: blur(60px);
    animation: pulse 10s infinite alternate;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-title .gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* Projects Section */
.projects-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: minmax(300px, auto);
    gap: 1.5rem;
}

.bento-card {
    position: relative;
    border-radius: 30px;
    overflow: hidden;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    border: 1px solid var(--card-border);
    background-color: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.bento-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 30px;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.bento-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.card-content {
    position: relative;
    z-index: 2;
    margin-bottom: 2rem;
}

.card-content h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.card-content p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 90%;
    margin-bottom: 1rem;
}

.badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card-image-wrapper {
    position: relative;
    width: 100%;
    flex-grow: 1;
    border-radius: 16px;
    overflow: hidden;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0.9;
}

.group:hover .group-hover-scale {
    transform: scale(1.05);
    opacity: 1;
}

.split-images {
    display: flex;
    gap: 10px;
}

.split-images img {
    width: 50%;
}

/* Grid Layout Spanning */
.bento-card.large {
    grid-column: span 12;
    min-height: 450px;
}

.bento-card.medium {
    grid-column: span 6;
    min-height: 400px;
}

/* Contact Section */
.contact-section {
    max-width: 1000px;
    margin: 0 auto 6rem;
    padding: 0 2rem;
}

.contact-card {
    border-radius: 30px;
    padding: 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, rgba(28,28,30,0.8), rgba(0,0,0,0.9));
    border: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(41,151,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.contact-info {
    max-width: 50%;
    z-index: 1;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.contact-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 1;
}

.qr-image {
    width: 200px;
    height: 200px;
    border-radius: 20px;
    border: 1px solid var(--card-border);
    padding: 10px;
    background: #fff;
}

.qr-caption {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Scroll Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }

/* Responsive Design */
@media (max-width: 900px) {
    .bento-card.medium {
        grid-column: span 12;
    }
    
    .contact-card {
        flex-direction: column;
        text-align: center;
        padding: 3rem 2rem;
        gap: 3rem;
    }
    
    .contact-info {
        max-width: 100%;
    }
}

@media (max-width: 600px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none; /* simple mobile nav */
    }
    
    .bento-card {
        padding: 1.5rem;
    }
    
    .split-images {
        flex-direction: column;
    }
    
    .split-images img {
        width: 100%;
        height: 200px;
    }
}