/* V17.1 - Grounded Bilingual Design System (Plus Jakarta Sans) */
:root {
    --bg-main: #080808;
    --bg-card: #121212;
    --bg-card-hover: #161616;
    --text-main: #f4f4f4;
    --text-muted: #8a8a8a;
    --accent-primary: #d4af37;
    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-strong: rgba(255, 255, 255, 0.1);
    
    --font-main: 'Plus Jakarta Sans', sans-serif;
    
    --ease-smooth: cubic-bezier(0.25, 1, 0.5, 1);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
}

/* SVG Noise Overlay */
body::before {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0.04;
    z-index: 9999;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

h4, h5, h6, .label-small {
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Language Switcher Logic */
[data-lang="id"] .en { display: none !important; }
[data-lang="en"] .id { display: none !important; }

.lang-toggle {
    display: flex;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}
.lang-toggle:hover { opacity: 1; }
.lang-toggle .active { color: var(--accent-primary); }

a { text-decoration: none; color: inherit; transition: opacity 0.3s ease; }
a:hover { opacity: 0.6; }

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section { padding: 12rem 0; position: relative; }
@media (max-width: 768px) { .section { padding: 8rem 0; } }

.flex-col { display: flex; flex-direction: column; }
.gap-2 { gap: 1rem; }
.gap-4 { gap: 2rem; }
.gap-6 { gap: 3rem; }

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-primary); }

.label-small { margin-bottom: 2rem; display: block; opacity: 0.6; }

h1 { font-size: clamp(3.5rem, 10vw, 6.5rem); }
h2 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h3 { font-size: 2.5rem; }

.lead { font-size: 1.4rem; font-weight: 300; line-height: 1.7; opacity: 0.7; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1.2rem 2.5rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.4s var(--ease-smooth);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary { background-color: var(--text-main); color: var(--bg-main); }
.btn-primary:hover { background-color: var(--accent-primary); transform: translateY(-2px); }

.btn-outline { background-color: transparent; color: var(--text-main); border-color: var(--border-strong); }
.btn-outline:hover { border-color: var(--text-main); }

/* Navbar */
.navbar {
    padding: 2.5rem 0;
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    transition: background 0.4s ease, padding 0.4s ease;
}
.navbar.scrolled {
    background: rgba(8, 8, 8, 0.9);
    backdrop-filter: blur(20px);
    padding: 1.5rem 0;
}
.nav-flex { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.02em; }
.nav-desktop { display: flex; gap: 3rem; align-items: center; }
.nav-desktop a { font-size: 0.75rem; opacity: 0.5; text-transform: uppercase; letter-spacing: 0.15em; font-weight: 700; }
.nav-desktop a:hover { opacity: 1; }

/* Discovery Index */
.discovery-index {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--border-subtle);
}
.index-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4.5rem 0;
    border-bottom: 1px solid var(--border-subtle);
    text-decoration: none;
    color: inherit;
    transition: padding 0.4s var(--ease-smooth);
}
.index-item:hover {
    padding-left: 2rem;
    opacity: 1;
}
.index-item h4 { font-size: 2.8rem; font-weight: 700; color: var(--text-main); margin: 0; letter-spacing: -0.03em; line-height: 1.1; }
.index-item p { font-size: 1.15rem; opacity: 0.5; font-weight: 300; max-width: 500px; margin-top: 0.75rem; }

/* Shelf Item */
.shelf-item {
    border-bottom: 1px solid var(--border-subtle);
    padding: 4.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}
.shelf-item h3 { font-size: 2.8rem; margin: 0; letter-spacing: -0.03em; }
.shelf-item p { max-width: 400px; margin-top: 1.2rem; font-weight: 300; opacity: 0.6; }

/* Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1.2s var(--ease-smooth), transform 1.2s var(--ease-smooth);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 768px) {
    .nav-desktop { display: none; }
    .index-item { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .index-item h4 { font-size: 2.2rem; }
}