:root {
    --bg-dark: #07070a;
    --fb-navy: #001A4C;
    --fb-yellow: #FFED00;
    --text-main: #f0f0f0;
    --text-muted: #a0a0a0;
    --glass-bg: rgba(0, 26, 76, 0.15);
    --glass-border: rgba(255, 237, 0, 0.2);
}

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

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

/* Navbar (Glassmorphism) */
.navbar {
    position: fixed;
    top: 0; left: 0; width: 100%;
    background: rgba(7, 7, 10, 0.7);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    z-index: 1000;
    padding: 15px 0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo { font-size: 24px; font-weight: 900; letter-spacing: 2px; }
.logo-biyosera { color: #fff; }
.logo-x { color: #555; font-weight: 300; margin: 0 5px; }
.logo-fb { color: var(--fb-yellow); text-shadow: 0 0 10px rgba(255,237,0,0.3); }

.fb-emblem { height: 40px; }

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background-image: url('assets/hero_bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0) 70%, rgba(7, 7, 10, 1) 100%);
    z-index: 1;
}

.hero-content {
    max-width: 900px;
    padding: 20px;
    z-index: 10;
    position: relative;
    background: transparent;
}

.hero-title {
    position: relative;
    display: block;
    font-size: 4rem;
    font-weight: 900;
    text-transform: uppercase;
    color: transparent;
    -webkit-text-stroke: 4px var(--fb-yellow);
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-title::before {
    content: attr(data-text);
    position: absolute;
    left: 0; top: 0; width: 100%; height: 100%;
    background: linear-gradient(90deg, #001A4C, #0056D2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0;
    pointer-events: none;
    z-index: 1;
}

.hero-subtitle {
    position: relative;
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: transparent;
    -webkit-text-stroke: 2px var(--fb-yellow);
}

.hero-subtitle::before {
    content: attr(data-text);
    position: absolute;
    left: 0; top: 0; width: 100%; height: 100%;
    background: linear-gradient(90deg, #001A4C, #0056D2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0;
    pointer-events: none;
    z-index: 1;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.7;
    animation: bounce 2s infinite;
}
.scroll-indicator span { font-size: 12px; letter-spacing: 2px; margin-bottom: 10px; color: var(--fb-yellow); }
.mouse {
    width: 24px; height: 36px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}
.mouse::before {
    content: '';
    position: absolute;
    top: 6px; left: 50%;
    transform: translateX(-50%);
    width: 4px; height: 8px;
    background: var(--fb-yellow);
    border-radius: 2px;
    animation: scroll 1.5s infinite;
}

@keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); } 40% { transform: translateY(-10px) translateX(-50%); } 60% { transform: translateY(-5px) translateX(-50%); } }
@keyframes scroll { 0% { opacity: 1; top: 6px; } 100% { opacity: 0; top: 16px; } }

/* Modules (Alternating Layout) */
.module {
    display: flex;
    align-items: center;
    max-width: 1200px;
    margin: 100px auto;
    padding: 0 20px;
    gap: 50px;
}
.module.reverse { flex-direction: row-reverse; }

.module-text {
    flex: 1;
}

.badge {
    display: inline-block;
    background: var(--glass-bg);
    color: var(--fb-yellow);
    border: 1px solid var(--glass-border);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.module-text h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.module-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 25px;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 15px;
    font-size: 1rem;
    color: #ddd;
}
.feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--fb-yellow);
    font-weight: bold;
}

.module-image {
    flex: 1;
    position: relative;
}

.module-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    border: 1px solid rgba(255,255,255,0.05);
    transition: transform 0.5s ease, box-shadow 0.5s ease;
}
.module-image:hover img {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(255,237,0,0.1);
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 100px;
    color: var(--text-muted);
    font-size: 14px;
}

/* Scroll Animations */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Responsiveness */
@media (max-width: 900px) {
    .module, .module.reverse {
        flex-direction: column;
        text-align: center;
        gap: 30px;
        margin: 60px auto;
    }
    .feature-list li { text-align: left; }
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.2rem; }
}

@media (max-width: 480px) {
    .nav-logo { font-size: 18px; }
    .hero-title { font-size: 2rem; }
}