/* --- Variables & Reset --- */
:root {
    --bg-primary: #0f0f13;
    --bg-secondary: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --accent: #00ff88;          /* 🌿 Hijau neon */
    --accent-2: #00cc6a;        /* 🌿 Hijau lebih gelap */
    --glass: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 100px 0; }
.gradient-text { 
    background: linear-gradient(90deg, var(--accent), var(--accent-2)); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
}

/* --- Navigasi (Flexbox) --- */
.navbar {
    position: fixed; top: 0; width: 100%; z-index: 1000;
    background: rgba(15, 15, 19, 0.8); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.nav-flex { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.logo { font-size: 1.5rem; font-weight: 800; text-decoration: none; color: var(--text-primary); }
.logo span { color: var(--accent); }
.nav-links { display: flex; list-style: none; gap: 30px; }
.nav-links a { text-decoration: none; color: var(--text-secondary); font-weight: 500; transition: color 0.3s; }
.nav-links a:hover { color: var(--accent); }
.btn-nav { 
    background: var(--glass); border: 1px solid var(--border); 
    padding: 8px 20px; border-radius: 20px; 
}

/* --- Bagian Hero (Parallax) --- */
.hero {
    height: 100vh; display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden; text-align: center;
}
.hero-bg {
    position: absolute; top: 0; left: 0; width: 100%; height: 120%;
    background: radial-gradient(circle at 50% 50%, rgba(0, 255, 136, 0.15), transparent 70%);
    z-index: -1; will-change: transform;
}
.hero-content { z-index: 1; }
.subtitle { 
    color: var(--accent); font-weight: 600; letter-spacing: 2px; 
    text-transform: uppercase; margin-bottom: 10px;
}
.hero-title { 
    font-size: clamp(2.5rem, 8vw, 5rem); font-weight: 800; 
    line-height: 1.1; margin-bottom: 20px; 
}
.hero-desc { 
    font-size: 1.2rem; color: var(--text-secondary); 
    max-width: 600px; margin: 0 auto 30px; 
}
.btn-primary {
    display: inline-block; padding: 15px 35px; 
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    color: var(--bg-primary); font-weight: 700; text-decoration: none; 
    border-radius: 50px; transition: transform 0.3s, box-shadow 0.3s;
}
.btn-primary:hover { 
    transform: translateY(-3px); 
    box-shadow: 0 10px 20px rgba(0, 255, 136, 0.3); 
}

/* --- Bagian Tentang --- */
.section-title { font-size: 2.5rem; text-align: center; margin-bottom: 50px; }
.about-text { 
    max-width: 800px; margin: 0 auto; text-align: center; 
    color: var(--text-secondary); font-size: 1.1rem;
}
.skills { 
    display: flex; flex-wrap: wrap; justify-content: center; 
    gap: 15px; margin-top: 30px; 
}
.skill-tag { 
    padding: 8px 20px; background: var(--glass); 
    border: 1px solid var(--border); border-radius: 20px; 
    font-size: 0.9rem; 
}

/* --- Bagian Proyek (CSS Grid + Filtering) --- */
.filter-buttons { 
    display: flex; justify-content: center; gap: 15px; 
    margin-bottom: 40px; flex-wrap: wrap; 
}
.filter-btn {
    padding: 10px 25px; background: transparent; 
    border: 1px solid var(--border); color: var(--text-secondary); 
    border-radius: 20px; cursor: pointer; transition: all 0.3s;
}
.filter-btn.active, .filter-btn:hover { 
    background: var(--accent); color: var(--bg-primary); 
    border-color: var(--accent); 
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--bg-secondary); border: 1px solid var(--border); 
    border-radius: 15px; overflow: hidden; 
    transition: transform 0.4s ease, box-shadow 0.4s;
}
.project-card:hover { 
    transform: translateY(-10px); 
    box-shadow: 0 20px 40px rgba(0,0,0,0.3); 
}
.project-card.hidden { display: none; }

.card-img { 
    height: 200px; background-size: cover; background-position: center; 
    transition: transform 0.5s; 
}
.project-card:hover .card-img { transform: scale(1.05); }
.card-content { padding: 25px; }
.card-content h3 { margin-bottom: 10px; font-size: 1.3rem; }
.card-content p { 
    color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 15px; 
}
.card-tag { 
    font-size: 0.8rem; color: var(--accent); 
    font-weight: 600; text-transform: uppercase; 
}

/* --- Footer --- */
.footer { 
    text-align: center; padding: 80px 0; 
    background: var(--bg-secondary); border-top: 1px solid var(--border); 
}
.footer h2 { font-size: 2rem; margin-bottom: 20px; }
.footer-desc { 
    color: var(--text-secondary); font-size: 1.1rem; 
    margin-bottom: 30px; 
}
.social-links { 
    display: flex; justify-content: center; gap: 20px; 
    margin: 30px 0; 
}
.social-links a { 
    color: var(--text-secondary); text-decoration: none; 
    transition: color 0.3s; 
}
.social-links a:hover { color: var(--accent); }
.copyright { 
    margin-top: 40px; color: var(--text-secondary); font-size: 0.9rem; 
}

/* --- Animasi Scroll --- */
.reveal { 
    opacity: 0; transform: translateY(30px); 
    transition: opacity 0.8s ease, transform 0.8s ease; 
}
.reveal.active { opacity: 1; transform: translateY(0); }

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-title { font-size: 2.5rem; }
    .section { padding: 60px 0; }
}