:root {
    --bg-color: #0a0a0a;
    --card-bg: #161616;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.4);
    --gradient-start: #3b82f6;
    --gradient-end: #8b5cf6;
    --font-main: 'Outfit', sans-serif;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 1px;
}

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

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

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10%;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 600px;
    z-index: 2;
}

.greeting {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

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

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

/* Buttons */
.cta-buttons {
    display: flex;
    gap: 1.5rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    display: inline-block;
}

.btn.primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

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

.btn.secondary:hover {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* Hero Visual Animation */
.hero-visual {
    position: absolute;
    right: -10%;
    top: 50%;
    transform: translateY(-50%);
    width: 600px;
    height: 600px;
    z-index: 1;
}

.data-sphere {
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.15), transparent 70%);
    filter: blur(60px);
    animation: pulse 8s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(0.8); opacity: 0.5; }
    100% { transform: scale(1.1); opacity: 1; }
}

/* Sections */
section {
    padding: 6rem 10%;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.about-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: 0.3s;
}

.about-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.about-card h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

/* Skills */
.skills-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.skills-wrapper h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

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

.tags span {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: 0.3s;
}

.tags span:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border-color: rgba(59, 130, 246, 0.3);
}

/* Contact */
#contact {
    text-align: center;
    background: linear-gradient(to top, #161616, transparent);
}

#contact p {
    margin-bottom: 2rem;
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    h1 { font-size: 3rem; }
    #hero { flex-direction: column; text-align: center; padding-top: 8rem; }
    .cta-buttons { justify-content: center; }
    nav { display: none; } /* Simplified for MVP */
    .hero-visual { display: none; }
}