:root {
    --bg-color: #121212;
    --primary-color: #1f1f1f;
    --secondary-color: #2a2a2a;
    --font-color: #e0e0e0;
    --accent-color: #ffffff;
    --gradient: linear-gradient(90deg, #4a90e2, #9013fe);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--font-color);
    line-height: 1.6;
}

header {
    background-color: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem 5%;
    position: fixed;
    width: 100%;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

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

nav a {
    color: var(--font-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

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

main {
    padding-top: 80px;
}

section {
    padding: 6rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

section h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--accent-color);
}

#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.hero-content p {
    font-size: 1.5rem;
    color: #a0a0a0;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    color: white;
    font-weight: 600;
    background: var(--gradient);
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.about-container {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.profile-pic {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--secondary-color);
}

.about-text {
    flex: 1;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.timeline-item {
    padding: 2rem;
    margin-bottom: 2rem;
    background-color: var(--primary-color);
    border-left: 4px solid;
    border-image: var(--gradient) 1;
    border-radius: 8px;
}
.timeline-item h3 { color: var(--accent-color); }
.timeline-item p { font-size: 0.9rem; color: #a0a0a0; }
.timeline-item ul { list-style-position: inside; margin-top: 1rem; }


.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--primary-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 { margin-bottom: 1rem; color: var(--accent-color); }
.project-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0; }
.project-tags span { background-color: var(--secondary-color); padding: 0.3rem 0.8rem; border-radius: 15px; font-size: 0.8rem; }
.btn-secondary { display: inline-block; padding: 0.5rem 1rem; border: 1px solid var(--font-color); color: var(--font-color); border-radius: 20px; text-decoration: none; transition: background 0.3s, color 0.3s; }
.btn-secondary:hover { background: var(--accent-color); color: var(--bg-color); }

#contact { text-align: center; }
#contact p { max-width: 600px; margin: 0 auto 2rem auto; }
.social-links { margin-top: 2rem; }
.social-links a { color: var(--font-color); text-decoration: none; margin: 0 1rem; font-weight: 600; }
.social-links a:hover { color: var(--accent-color); }

footer { text-align: center; padding: 2rem 5%; background-color: var(--primary-color); }

/* Responsive Design */
@media (max-width: 768px) {
    nav ul { display: none; } /* Simple hide for mobile, can be replaced with hamburger menu */
    .hero-content h1 { font-size: 2.5rem; }
    .hero-content p { font-size: 1.2rem; }
    .about-container { flex-direction: column; text-align: center; }
    section { padding: 4rem 5%; }
}