:root {
    /* Base Colors - LIGHT THEME */
    --clr-bg: #f8fafc;
    --clr-bg-alt: #ffffff;
    --clr-card: #ffffff;
    --clr-card-hover: #f1f5f9;
    --clr-border: rgba(0, 0, 0, 0.08);
    
    /* Text Colors */
    --clr-text: #0f172a;
    --clr-text-muted: #475569;
    
    /* Brand Accent Colors */
    --clr-blue: #0ea5e9;
    --clr-blue-hover: #028fc2;
    --clr-pink: #ec4899;
    --clr-yellow: #f59e0b;
    --clr-green: #10b981;
    --clr-red: #ef4444;
    
    /* Fonts */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing & Sizes */
    --container-width: 1100px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: 0.3s ease;
}

/* Reset & Global */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    background-color: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.6;
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

h1, h2, h3, h4, .font-outfit {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: #1e293b;
}

a {
    text-decoration: none;
    color: var(--clr-blue);
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

strong {
    color: #0f172a;
    font-weight: 700;
}

/* Utility Classes */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 10;
}

.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 2rem; }
.mt-4 { margin-top: 3rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 2rem; }

.max-w-lg { max-width: 800px; }
.mx-auto { margin-left: auto; margin-right: auto; }
.position-relative { position: relative; }
.align-center { display: flex; flex-direction: column; align-items: center; text-align: center; }

/* Gradients & Glows (Adjusted for Light Theme) */
.text-gradient {
    background: linear-gradient(90deg, var(--clr-blue), var(--clr-pink));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.text-gradient-yellow {
    background: linear-gradient(90deg, var(--clr-yellow), #d97706);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.glow-bg {
    position: absolute;
    width: 40vw;
    height: 40vw;
    border-radius: 50%;
    filter: blur(100px);
    z-index: 0;
    opacity: 0.1; /* Lower opacity for light theme */
}
.glow-pink { background: var(--clr-pink); top: -10%; right: -10%; }
.glow-blue { background: var(--clr-blue); bottom: -10%; left: -10%; }

.border-left-blue { border-left: 4px solid var(--clr-blue); }
.border-glow-blue { box-shadow: 0 0 20px rgba(14, 165, 233, 0.2); border: 1px solid rgba(14, 165, 233, 0.4) !important;}
.border-glow-pink { box-shadow: 0 0 20px rgba(236, 72, 153, 0.15); border: 1px solid rgba(236, 72, 153, 0.4) !important;}
.neon-border { position: relative; }
.neon-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: var(--radius-lg);
    background: linear-gradient(45deg, var(--clr-pink), var(--clr-blue), var(--clr-yellow));
    z-index: -1;
    background-size: 200% 200%;
    animation: neonFlow 5s ease infinite;
    opacity: 0.6;
}
@keyframes neonFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Specific Colors */
.color-suka { color: var(--clr-pink); }
.color-jago { color: var(--clr-blue); }
.color-cuan { color: var(--clr-yellow); }
.text-red { color: var(--clr-red); }
.text-green { color: var(--clr-green); }
.text-highlight { position: relative; display: inline-block; z-index: 1; }
.text-highlight::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 2px;
    width: 100%;
    height: 8px;
    background-color: rgba(236, 72, 153, 0.3);
    z-index: -1;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}
.btn-sm { padding: 8px 16px; font-size: 0.875rem; }
.btn-lg { padding: 16px 32px; font-size: 1.125rem; font-family: var(--font-heading);}
.btn-full { width: 100%; padding: 12px; }

.btn-primary {
    background: linear-gradient(90deg, var(--clr-blue), #028fc2);
    color: #fff !important;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--clr-text);
    border: 1px solid var(--clr-border);
}
.btn-outline:hover {
    background: var(--clr-bg);
    border-color: var(--clr-text-muted);
}

.shadow-glow { animation: pulseGlow 2s infinite; }
@keyframes pulseGlow {
    0% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(14, 165, 233, 0); }
    100% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0); }
}

/* Glassmorphism Card (Light Theme Version) */
.glass-card {
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05); /* Soft shadow since background is white */
}

/* Layout Blocks */
.section { padding: 80px 0; }
.bg-alt { background-color: var(--clr-bg-alt); border-top: 1px solid var(--clr-border); border-bottom: 1px solid var(--clr-border); }
.section-title { font-size: 2.5rem; margin-bottom: 0.5rem; color: #0f172a; }
.section-desc { color: var(--clr-text-muted); font-size: 1.125rem; margin-bottom: 2rem; }

/* Navigation */
.glass-nav {
    position: fixed;
    top: 0; left: 0; width: 100%;
    padding: 16px 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--clr-border);
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}
.nav-container { display: flex; justify-content: space-between; align-items: center; }

/* Hero */
.hero { padding: 120px 0 80px; position: relative; overflow: hidden; min-height: 100vh; display: flex; align-items: center;}
.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
.badge { display: inline-block; padding: 6px 12px; background: #e2e8f0; border-radius: 50px; font-size: 0.75rem; font-weight: 600; letter-spacing: 1px; margin-bottom: 1rem; color: var(--clr-text-muted); }
.badge-yellow { background: rgba(245, 158, 11, 0.15); color: var(--clr-yellow); }
.link-badge { color: var(--clr-blue); }
.hero-title { font-size: 3.5rem; margin-bottom: 1.5rem; line-height: 1.1; color: #0f172a; }
.hero-subtitle { font-size: 1.125rem; color: var(--clr-text-muted); margin-bottom: 2rem; }

/* Pre-Order Box */
.pre-order-box {
    padding: 24px;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    background: var(--clr-card);
}
.po-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; font-size: 0.875rem; }
.po-badge { color: var(--clr-pink); font-weight: 700; display: flex; align-items: center; gap: 4px; }
.po-limit { font-weight: 600; color: var(--clr-text-muted); }
.progress-bar-container { height: 8px; background: rgba(0, 0, 0, 0.05); border-radius: 4px; overflow: hidden; margin-bottom: 0.5rem; border: 1px inset rgba(0,0,0,0.1); }
.progress-bar { height: 100%; background: linear-gradient(90deg, var(--clr-pink), var(--clr-yellow)); border-radius: 4px; }
.po-stats { font-weight: 700; font-size: 1.125rem; font-family: var(--font-heading); color: #0f172a;}
.po-note { font-size: 0.75rem; color: var(--clr-text-muted); margin-top: 0.5rem; }

.hero-cta { display: flex; flex-direction: column; gap: 1rem; }
.whatsapp-link { color: var(--clr-green); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }

.book-cover {
    width: 100%;
    max-width: 450px;
    margin: 0 auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2), 0 0 80px rgba(14, 165, 233, 0.1);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: var(--transition);
}
.book-cover:hover { transform: perspective(1000px) rotateY(0deg) rotateX(0deg); }

/* Reality Check */
.reality-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 3rem; }
.icon-circle { width: 64px; height: 64px; border-radius: 50%; display: flex; justify-content: center; align-items: center; font-size: 2rem; margin-bottom: 1.5rem; }
.icon-red { background: rgba(239, 68, 68, 0.1); color: var(--clr-red); box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2); }
.icon-orange { background: rgba(249, 115, 22, 0.1); color: #f97316; box-shadow: 0 4px 12px rgba(249, 115, 22, 0.2); }
.icon-yellow { background: rgba(245, 158, 11, 0.1); color: var(--clr-yellow); box-shadow: 0 4px 12px rgba(245, 158, 11, 0.2); }

/* Masalah */
.masalah-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.quote-box { border-left: 4px solid var(--clr-pink); padding-left: 1rem; font-size: 1.5rem; font-family: var(--font-heading); font-style: italic; margin: 1.5rem 0; color: #1e293b; background: rgba(236,72,153, 0.05); padding: 16px; border-radius: 4px 12px 12px 4px; }
.feature-list { list-style: none; margin-top: 1rem; display: flex; flex-direction: column; gap: 12px; }
.feature-list li { display: flex; align-items: center; gap: 12px; font-size: 1.125rem; font-weight: 500; color: #1e293b;}
.masalah-points h3 { font-size: 1.25rem; color: #0f172a; }

/* Sweet Spot */
.sweet-spot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.sweet-card {
    background: var(--clr-card); padding: 40px 24px; border-radius: 100px 100px 24px 24px; border: 1px solid var(--clr-border); transition: var(--transition);
}
.sweet-card:hover { transform: translateY(-10px); background: var(--clr-card-hover); box-shadow: 0 15px 30px rgba(0,0,0,0.08); }
.sweet-icon { width: 80px; height: 80px; border-radius: 50%; display: flex; justify-content: center; align-items: center; font-size: 2.5rem; margin: 0 auto 1.5rem; color: #fff; }
.card-suka .sweet-icon { background: linear-gradient(135deg, var(--clr-pink), #ff7a91); box-shadow: 0 10px 20px rgba(236, 72, 153, 0.3); }
.card-jago .sweet-icon { background: linear-gradient(135deg, var(--clr-blue), #3bcef9); box-shadow: 0 10px 20px rgba(14, 165, 233, 0.3); }
.card-cuan .sweet-icon { background: linear-gradient(135deg, var(--clr-yellow), #ffd954); box-shadow: 0 10px 20px rgba(245, 158, 11, 0.3); color: #fff; }

/* Tentang Buku */
.about-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 40px; align-items: center; }
.book-mockup img, .book-mockup video { border-radius: 12px; filter: drop-shadow(0 20px 30px rgba(0,0,0,0.15)); }
.book-mockup video { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 400 / 550; }
.subtitle { color: var(--clr-blue); font-weight: 700; letter-spacing: 2px; font-size: 0.875rem; }

/* Apa Dipelajari */
.learn-grid { display: flex; flex-direction: column; gap: 16px; max-width: 700px; margin-left: auto; margin-right: auto; }
.learn-card { display: flex; gap: 16px; align-items: center; padding: 24px; background: var(--clr-bg-alt); }
.l-icon { font-size: 2rem; color: var(--clr-blue); background: rgba(14, 165, 233, 0.1); padding: 12px; border-radius: 12px; }

/* Bonus */
.bonus-wrapper { padding: 48px; background: var(--clr-bg); }
.bonus-list { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.bonus-item { display: flex; gap: 16px; align-items: center; background: #fff; padding: 16px; border-radius: var(--radius-md); border: 1px solid var(--clr-border); box-shadow: 0 4px 10px rgba(0,0,0,0.02);}
.b-icon { font-size: 2rem; color: var(--clr-yellow); }
.b-content h4 { font-size: 1.125rem; font-family: var(--font-body); margin-bottom: 4px; color: #0f172a;}
.strike { text-decoration: line-through; color: var(--clr-text-muted); font-size: 0.875rem; }
.highlight { color: var(--clr-pink); font-size: 0.875rem; font-weight: 600; }

.bonus-total { background: #fff; padding: 24px; border-radius: var(--radius-md); display: flex; flex-direction: column; gap: 8px; border: 1px solid var(--clr-border); box-shadow: 0 8px 20px rgba(0,0,0,0.04); }
.strike-big { text-decoration: line-through; color: var(--clr-text-muted); font-size: 1.25rem; }
.price-now { font-size: 1.5rem; color: #0f172a; font-weight: 600;}
.price-now span { font-size: 2.5rem; font-weight: 800; font-family: var(--font-heading); color: var(--clr-yellow); }

/* Impact */
.impact-icon { font-size: 4rem; color: var(--clr-blue); margin-bottom: 1rem; }
.divider { border: 0; height: 1px; background: var(--clr-border); margin: 1.5rem 0; }

/* Testimoni */
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testi-card { position: relative; padding-top: 48px; background: #fff; }
.quote-icon { position: absolute; top: -20px; left: 32px; width: 48px; height: 48px; background: linear-gradient(135deg, var(--clr-blue), var(--clr-pink)); border-radius: 50%; display: flex; justify-content: center; align-items: center; font-size: 1.5rem; color: #fff; box-shadow: 0 10px 20px rgba(14,165,233,0.2); }
.testi-text { font-style: italic; color: #475569; margin-bottom: 1.5rem; flex-grow: 1; }
.testi-author { display: flex; gap: 12px; align-items: center; border-top: 1px solid var(--clr-border); padding-top: 1rem; }
.avatar { color: var(--clr-blue); }
.author-info strong { display: block; font-size: 1rem; color: #0f172a; }
.author-info span { font-size: 0.75rem; color: var(--clr-text-muted); }

/* Penulis */
.author-layout { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; align-items: center; }
.author-image { width: 100%; aspect-ratio: 1; border-radius: var(--radius-lg); display: flex; justify-content: center; align-items: center; overflow: hidden; background: var(--clr-card); }
.author-placeholder { font-size: 8rem; color: var(--clr-border); }
.author-title { background: rgba(14, 165, 233, 0.1); color: var(--clr-blue); margin-top: 1rem; font-weight: 600; padding: 4px 12px;}

/* Pricing Section */
.pricing-compare { font-size: 1.25rem; }
.price-normal { text-decoration: line-through; color: var(--clr-text-muted); margin-right: 1rem; }
.price-po { font-weight: 700; color: var(--clr-yellow); }
.delivery-date { font-size: 0.875rem; padding: 12px 24px; border-radius: 50px; background: var(--clr-card); border: 1px solid var(--clr-border); color: #0f172a; font-weight: 500;}

.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pricing-card { position: relative; transition: var(--transition); display: flex; flex-direction: column; background: #fff; }
.pricing-card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px rgba(0,0,0,0.08); }
.badge-recommended { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: linear-gradient(90deg, var(--clr-pink), #f472b6); color: #fff; padding: 4px 16px; border-radius: 50px; font-size: 0.75rem; font-weight: 700; letter-spacing: 1px; box-shadow: 0 4px 10px rgba(236, 72, 153, 0.3);}
.p-recommended { border-color: var(--clr-pink); }
.p-header h3 { font-size: 1.5rem; letter-spacing: 1px; }
.p-qty { color: var(--clr-text-muted); font-size: 0.875rem; }
.p-price { font-size: 2.5rem; font-weight: 800; font-family: var(--font-heading); margin: 1rem 0; color: #0f172a; }
.p-desc { font-size: 0.875rem; color: var(--clr-text-muted); margin-bottom: 1rem; min-height: 40px; }
.p-features { list-style: none; margin-bottom: 2rem; flex-grow: 1; }
.p-features li { padding: 8px 0; border-bottom: 1px dashed var(--clr-border); display: flex; gap: 8px; align-items: center; color: #1e293b;}

/* FAQ - FIXED BEHAVIOR */
.faq-container { display: flex; flex-direction: column; gap: 16px; max-width: 800px; margin-left: auto; margin-right: auto; }
.faq-item { background: var(--clr-card); border: 1px solid var(--clr-border); border-radius: var(--radius-md); box-shadow: 0 4px 10px rgba(0,0,0,0.02);}
.faq-question { padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; background: transparent; }
.faq-question h4 { font-family: var(--font-body); font-weight: 600; font-size: 1.125rem; margin: 0; color: #0f172a; }
.icon-caret { transition: transform 0.2s ease; color: #0f172a; }

/* No transition, fully normal behavior */
.faq-answer { display: none; padding: 0 24px 24px; color: var(--clr-text-muted); }
.faq-item.active .faq-question { background: var(--clr-bg); border-bottom: 1px solid rgba(0,0,0,0.05); }
.faq-item.active .faq-answer { display: block; padding-top: 16px; }
.faq-item.active .icon-caret { transform: rotate(180deg); }

/* Footer */
.footer { border-top: 1px solid var(--clr-border); padding: 24px 0; font-size: 0.875rem; color: var(--clr-text-muted); background: var(--clr-bg-alt); }

/* Responsive Media Queries */
@media (max-width: 1024px) {
    .container { padding: 0 20px; }
    .hero-title { font-size: 2.75rem; }
    .section-title { font-size: 2.25rem; }
}

@media (max-width: 768px) {
    .hero-container, .masalah-layout, .about-grid, .author-layout { grid-template-columns: 1fr; }
    .hero { padding: 100px 0 60px; text-align: center; }
    .hero-cta { flex-direction: column; align-items: center; }
    
    .reality-grid, .sweet-spot-grid, .testi-grid, .pricing-grid { grid-template-columns: 1fr; }
    
    .bonus-list { grid-template-columns: 1fr; }
    .bonus-wrapper { padding: 32px 20px; }
    
    .author-image-wrapper { max-width: 300px; margin: 0 auto; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .section-title { font-size: 1.75rem; }
    .btn-lg { font-size: 1rem; width: 100%; }
    .price-now span { font-size: 2rem; }
    .glass-card { padding: 20px; }
    .faq-question { padding: 16px; }
    .bonus-wrapper { padding: 24px 16px; }
    .container { padding: 0 16px; }
}

/* Animations */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s ease; }
.reveal.active { opacity: 1; transform: translateY(0); }