/* === DESIGN TOKENS & RESET === */
:root {
    /* Colors (Dark Theme - Default) */
    --color-background: #0B0B0C;
    --color-surface: #111318;
    --color-text-primary: #EDEFF2;
    --color-text-secondary: #AEB4BE;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-accent-primary: #6C7FFF;
    --color-accent-secondary: #1CE783;
    --color-btn-primary-text: #0B0B0C;
    
    /* Typography */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* Spacing & Sizing */
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 180ms ease-in-out;
    --transition-medium: 250ms ease-in-out;
}

html.theme-light {
    --color-background: #F7F8FA;
    --color-surface: #FFFFFF;
    --color-text-primary: #111318;
    --color-text-secondary: #5a6474;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-btn-primary-text: #FFFFFF;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background-color: var(--color-background);
    color: var(--color-text-primary);
    font-family: var(--font-family-base);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-medium), color var(--transition-medium);
}
body.menu-open { overflow: hidden; }
a { color: var(--color-accent-primary); text-decoration: none; transition: opacity var(--transition-fast); }
a:hover { opacity: 0.8; }
img, svg { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.2; font-weight: 700; }

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 2.5rem);
}

/* === UTILITIES & BUTTONS === */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background-color: var(--color-accent-primary); color: var(--color-btn-primary-text); }
.btn-secondary { background-color: var(--color-surface); color: var(--color-text-primary); border: 1px solid var(--color-border); }
.btn-secondary:hover { border-color: var(--color-accent-primary); }
.section-title {
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    text-align: center;
    margin-bottom: 3rem;
    letter-spacing: -0.03em;
}

/* === HEADER & NAVIGATION (REWRITTEN FOR STABILITY) === */
.site-header {
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    background: color-mix(in srgb, var(--color-background) 80%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
}
.header-container { display: flex; align-items: center; }
.logo { color: var(--color-text-primary); }
.main-nav a { color: var(--color-text-secondary); font-weight: 600; }
.main-nav a:hover, .main-nav a.active { color: var(--color-text-primary); }
.header-actions { display: flex; align-items: center; gap: 1rem; }
.theme-toggle { background: none; border: none; cursor: pointer; color: var(--color-text-secondary); padding: 4px; }
.theme-toggle .moon { display: none; }
html.theme-light .theme-toggle .sun { display: none; }
html.theme-light .theme-toggle .moon { display: block; }

.mobile-menu-toggle { display: none; background: none; border: none; cursor: pointer; color: var(--color-text-primary); position: relative; z-index: 102; }
.mobile-menu-toggle .close-icon { display: none; }

/* --- DESKTOP NAVIGATION (min-width: 1024px) --- */
@media (min-width: 1024px) {
    .header-container { gap: 2rem; }
    .logo { margin-right: auto; }
    .header-actions .btn-primary { display: inline-block; }
    .main-nav { display: flex; align-items: center; gap: 2rem; }
    .main-nav .btn-secondary-nav { display: block; }
}

/* --- MOBILE NAVIGATION (max-width: 1023px) --- */
@media (max-width: 1023px) {
    .header-container { justify-content: space-between; }
    .header-actions .btn-primary { display: none; }
    .mobile-menu-toggle { display: block; }

    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: var(--color-background);
        z-index: 101;

        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2.5rem;
        font-size: 1.5rem;

        /* Hiding mechanism */
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: opacity var(--transition-medium), visibility var(--transition-medium), transform var(--transition-medium);
    }
    
    body.menu-open .main-nav {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    body.menu-open .mobile-menu-toggle .menu-icon { display: none; }
    body.menu-open .mobile-menu-toggle .close-icon { display: block; }
}

/* === HERO SECTION === */
.hero { padding: 8rem 0; text-align: center; position: relative; overflow: hidden; }
.hero-bg {
    position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: -1;
    background-image: radial-gradient(circle at top left, color-mix(in srgb, var(--color-accent-primary) 15%, transparent) 0%, transparent 30%),
                      radial-gradient(circle at bottom right, color-mix(in srgb, var(--color-accent-secondary) 10%, transparent) 0%, transparent 30%);
    opacity: 0.5;
}
.hero-content { max-width: 750px; margin: 0 auto; }
h1 { font-size: clamp(2.5rem, 6vw, 4rem); letter-spacing: -0.04em; }
.subheadline { font-size: clamp(1.1rem, 3vw, 1.25rem); color: var(--color-text-secondary); max-width: 600px; margin: 1.5rem auto 2.5rem; }
.hero-cta { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.collaborator-badge { margin-top: 3rem; font-size: 0.9rem; color: var(--color-text-secondary); }
.collaborator-badge a { color: var(--color-text-primary); font-weight: 600; border-bottom: 1px solid transparent; }
.collaborator-badge a:hover { border-bottom-color: var(--color-text-primary); }

/* === CATEGORIES === */
.categories { padding: 4rem 0; }
.categories-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.category-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 2rem;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
}
.category-card:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--color-accent-primary) 50%, transparent); }
.card-icon { color: var(--color-accent-primary); margin-bottom: 1rem; }
.card-icon svg { width: 28px; height: 28px; }
.category-card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.category-card p { color: var(--color-text-secondary); margin-bottom: 1.5rem; }
.card-link { font-weight: 600; }

/* === UPDATES SECTION === */
.updates-section { padding: 4rem 0; }
.updates-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}
.update-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}
.update-card h4 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
}
.update-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
    flex-grow: 1; /* Makes sure cards in a row have same height */
}
.update-meta {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    opacity: 0.8;
}

/* === BANNERS & SOCIAL PROOF === */
.rate-limit-banner { background-color: var(--color-surface); padding: 1rem 0; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.banner-container { display: flex; justify-content: center; align-items: center; text-align: center; gap: 1rem; }
.banner-container p { color: var(--color-text-secondary); }
.banner-container strong { color: var(--color-text-primary); }
.dismiss-btn { background: none; border: none; color: var(--color-text-secondary); cursor: pointer; }
.social-proof { padding: 4rem 0; }
.social-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.social-card {
    display: flex; align-items: center; gap: 1.5rem;
    background-color: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: 12px; padding: 1.5rem;
    transition: transform var(--transition-medium), border-color var(--transition-medium);
}
.social-card:hover { transform: translateY(-5px); border-color: var(--color-text-secondary); }
.social-icon { color: var(--color-text-primary); }
.social-content h3 { font-size: 1.1rem; color: var(--color-text-primary); }
.social-content p { color: var(--color-text-secondary); font-size: 0.9rem; }

/* === FOOTER === */
.site-footer-bottom { padding: 2rem 0; border-top: 1px solid var(--color-border); font-size: 0.9rem; color: var(--color-text-secondary); }
.footer-bottom-container { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 1rem; }
.footer-brand .brand-note { font-size: 0.8rem; opacity: 0.7; margin-top: 0.5rem; }
.footer-links { display: flex; align-items: center; gap: 0.5rem; }
.footer-links span { opacity: 0.5; }

/* === RESPONSIVE MEDIA QUERIES (NON-NAV) === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
@media (min-width: 600px) {
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
    .social-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
    .categories-grid { grid-template-columns: repeat(3, 1fr); }
    .updates-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-bottom-container { flex-direction: row; justify-content: space-between; }
}

/* === LANGUAGE SWITCHER STYLES === */
.language-switcher {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.lang-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    border-radius: 50%;
    opacity: 0.5;
    transition: opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.lang-btn:hover {
    opacity: 1;
    transform: scale(1.1);
}
.lang-btn.active {
    opacity: 1;
    transform: scale(1.1);
    box-shadow: 0 0 0 2px var(--color-background), 0 0 0 4px var(--color-accent-primary);
}
.lang-btn img {
    display: block;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

@media (max-width: 1023px) {
    .main-nav .language-switcher {
        order: 10; /* Pindahkan switcher ke bawah di menu mobile */
        margin-top: 2rem;
    }
}