:root {
    --bg-dark: #0a0a0a;
    --bg-card: #141414;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #6366f1; /* Indigo */
    --accent-secondary: #ec4899; /* Pink */
    --border-color: #2a2a2a;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
}

/* Typography */
h1, h2, h3, h4 { font-weight: 800; letter-spacing: -0.02em; }
p { color: var(--text-secondary); line-height: 1.6; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 0;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}
.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}
.logo { font-size: 1.5rem; font-weight: 800; color: var(--text-primary); }
.nav-links { display: flex; list-style: none; gap: 2rem; align-items: center; }
.nav-links a { color: var(--text-secondary); text-decoration: none; transition: var(--transition); font-weight: 600; font-size: 0.9rem;}
.nav-links a:hover { color: var(--text-primary); }

/* Buttons */
.btn-primary, .btn-primary-small, .btn-secondary, .resume-btn {
    display: inline-block;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}
.btn-primary {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3); }
.btn-primary-small {
    padding: 0.6rem 1.2rem;
    background: white;
    color: black !important;
}
.btn-primary-small:hover { background: #e0e0e0; transform: translateY(-1px); }
.btn-secondary {
    padding: 1rem 2rem;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover { background: var(--bg-card); border-color: var(--text-secondary); }

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 0 2rem;
}
.hero-content { text-align: center; z-index: 2; max-width: 800px; }
.hero h1 { font-size: 4.5rem; margin-bottom: 0.5rem; background: linear-gradient(135deg, #fff, #a0a0a0); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero h2 { font-size: 2rem; color: var(--text-secondary); margin-bottom: 1.5rem; font-weight: 400;}
.hero p { font-size: 1.1rem; margin-bottom: 2.5rem; max-width: 600px; margin-left: auto; margin-right: auto;}
.hero-cta { display: flex; gap: 1rem; justify-content: center; }

/* Background Blur Effects */
.hero-background { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: 0; overflow: hidden; pointer-events: none;}
.gradient-sphere {
    position: absolute;
    width: 600px; height: 600px;
    background: var(--accent-primary);
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.15;
    top: -100px; left: -100px;
}
.gradient-sphere.secondary {
    background: var(--accent-secondary);
    bottom: -200px; right: -100px;
    top: auto; left: auto;
}

/* Sections General */
.section { padding: 6rem 2rem; max-width: 1200px; margin: 0 auto; }
.section-title { font-size: 2.5rem; margin-bottom: 3rem; text-align: center; }

/* Timeline Experience */
.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0; height: 100%; width: 2px;
    background: var(--border-color);
}
.timeline-item { margin-bottom: 3rem; position: relative; padding-left: 60px; }
.timeline-dot {
    position: absolute; left: 11px; top: 5px;
    width: 20px; height: 20px;
    background: var(--accent-primary);
    border-radius: 50%;
    border: 4px solid var(--bg-dark);
}
.timeline-content {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}
.timeline-content:hover { transform: translateY(-5px); border-color: var(--accent-primary); }
.timeline-content h3 { font-size: 1.5rem; margin-bottom: 0.3rem; }
.timeline-content h4 { color: var(--accent-secondary); font-size: 1rem; margin-bottom: 1rem; font-weight: 600;}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.skill-card {
    background: var(--bg-card);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}
.skill-card:hover { transform: translateY(-5px); border-color: var(--accent-primary); background: #1a1a1a; }
.skill-icon { font-size: 3rem; margin-bottom: 1.5rem; }
.skill-card h3 { margin-bottom: 1rem; font-size: 1.3rem;}

/* Contact Section */
.contact-container {
    text-align: center;
    background: var(--bg-card);
    padding: 4rem 2rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    max-width: 800px;
    margin: 0 auto;
}
.resume-links { display: flex; justify-content: center; gap: 1rem; margin: 2rem 0; flex-wrap: wrap;}
.resume-btn { padding: 1rem 1.5rem; background: var(--border-color); color: white; border: 1px solid #333; }
.resume-btn:hover { background: #333; border-color: var(--accent-primary); }
.contact-info p { font-size: 1.2rem; margin-bottom: 1rem; }
.contact-info a { color: var(--accent-primary); text-decoration: none; }
.contact-info a:hover { text-decoration: underline; }

/* Footer */
footer { text-align: center; padding: 2rem; color: var(--text-secondary); border-top: 1px solid var(--border-color); margin-top: 4rem; font-size: 0.9rem;}

/* Animations */
.fade-in { opacity: 0; transform: translateY(20px); animation: fadeIn 0.8s ease forwards; }
.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeIn {
    to { opacity: 1; transform: translateY(0); }
}

/* Scroll Reveal classes applied via JS */
.reveal { opacity: 0; transform: translateY(40px); transition: all 0.8s ease; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 3rem; }
    .nav-links { display: none; } /* Add hamburger later if needed */
    .hero-cta { flex-direction: column; }
    .timeline::before { left: 15px; }
    .timeline-item { padding-left: 45px; }
    .timeline-dot { left: 6px; }
}