:root {
    --bg-dark: #0f172a;
    --card-bg: #1e293b;
    --accent: #38bdf8;
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Nav */
nav {
    display: flex;
    justify-content: space-between;
    padding: 25px 8%;
    position: fixed;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
}

.logo { font-weight: 800; letter-spacing: 2px; color: var(--accent); }

nav ul { display: flex; list-style: none; gap: 30px; }

nav ul li a {
    text-decoration: none;
    color: var(--text-main);
    font-size: 0.9rem;
    transition: 0.3s;
}

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 8%;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    align-items: center;
}

.hero-image img {
    width: 100%;
    max-width: 350px;
    border-radius: 20px;
    filter: grayscale(100%); /* Menyesuaikan dengan foto Anda */
    border: 2px solid var(--accent);
    box-shadow: 0 0 30px rgba(56, 189, 248, 0.2);
    transition: 0.5s;
}

.hero-image img:hover {
    filter: grayscale(0%);
    transform: scale(1.02);
}

.badge-inst {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.hero-text h1 {
    font-size: 4.5rem;
    margin: 15px 0;
    background: linear-gradient(to right, #fff, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-dim);
}

.tagline span { color: white; font-weight: 600; }

.social-links {
    margin-top: 30px;
    display: flex;
    gap: 20px;
}

.social-links a {
    color: var(--text-main);
    text-decoration: none;
    font-size: 1rem;
    border: 1px solid #334155;
    padding: 10px 20px;
    border-radius: 8px;
    transition: 0.3s;
}

.social-links a:hover {
    background: var(--accent);
    color: var(--bg-dark);
}

/* Stats Section */
.stats { padding: 50px 0; background: #0b1120; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    text-align: center;
}

.stat-card h3 { font-size: 3.5rem; color: var(--accent); }
.stat-card p { color: var(--text-dim); text-transform: uppercase; letter-spacing: 2px; }

/* Publications */
.publications { padding: 100px 8%; }
.section-title { font-size: 2.5rem; margin-bottom: 10px; }
.filter-info { color: var(--text-dim); margin-bottom: 40px; }

.pub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.pub-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid #334155;
    transition: 0.3s;
    position: relative;
}

.pub-card:hover {
    border-color: var(--accent);
    transform: translateY(-10px);
}

.pub-year {
    color: var(--accent);
    font-weight: bold;
    margin-bottom: 15px;
}

.pub-card h3 { margin-bottom: 15px; line-height: 1.4; }
.pub-card p { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 20px; }

.pub-footer {
    border-top: 1px solid #334155;
    padding-top: 15px;
    font-size: 0.8rem;
    color: var(--accent);
}

.highlight { background: linear-gradient(45deg, #1e293b, #0f172a); border: 1px dashed var(--accent); }

/* Footer */
footer {
    padding: 80px 8%;
    background: #0b1120;
    text-align: center;
}

.co-authors { color: var(--text-dim); margin: 20px 0; }
hr { border: 0; border-top: 1px solid #334155; margin: 40px 0; }
.copyright { font-size: 0.8rem; color: #475569; }

@media (max-width: 768px) {
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-image { order: -1; }
    .hero-text h1 { font-size: 3rem; }
    nav ul { display: none; }
    .stats-grid { grid-template-columns: 1fr; gap: 30px; }
}