:root {
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    
    /* 3D Brand Colors */
    --brand-pink: #d6249f;
    --brand-orange: #fd5949;
    --brand-yellow: #fdf497;
    --brand-blue: #285AEB;
    
    --ig-gradient: linear-gradient(45deg, var(--brand-yellow), var(--brand-orange), var(--brand-pink), var(--brand-blue));
    
    /* 3D Shadows */
    --shadow-3d: 
        5px 5px 15px rgba(0,0,0,0.1), 
        -5px -5px 15px rgba(255,255,255,1),
        inset 0px 0px 0px transparent;
        
    --shadow-3d-inset: 
        inset 5px 5px 10px rgba(0,0,0,0.05),
        inset -5px -5px 10px rgba(255,255,255,1);
        
    --shadow-btn: 0 10px 20px rgba(214, 36, 159, 0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Nunito', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { background-color: var(--bg-primary); color: var(--text-primary); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); }
ul { list-style: none; }

/* Navbar */
.nav { background: rgba(248, 249, 250, 0.9); backdrop-filter: blur(10px); padding: 15px 5%; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 1000; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
.nav-brand { font-size: 26px; font-weight: 800; background: var(--ig-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }
.nav-links a:hover, .nav-links a.active { color: var(--brand-pink); text-shadow: 1px 1px 2px rgba(0,0,0,0.1); }
.nav-btn { background: var(--bg-primary); color: var(--brand-pink) !important; padding: 10px 24px; border-radius: 30px; font-weight: 700; box-shadow: var(--shadow-3d); border: 2px solid transparent; }
.nav-btn:hover { box-shadow: var(--shadow-3d-inset); color: var(--brand-orange) !important; }

/* Hero */
.hero { text-align: center; padding: 100px 20px 80px; max-width: 900px; margin: 0 auto; position: relative; }
.hero-icon { font-size: 80px; display: inline-block; background: var(--ig-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; filter: drop-shadow(0 10px 10px rgba(0,0,0,0.1)); margin-bottom: 20px; }
.hero h1 { font-size: 58px; font-weight: 900; line-height: 1.15; margin-bottom: 24px; letter-spacing: -1px; color: var(--text-primary); text-shadow: 2px 2px 4px rgba(0,0,0,0.05); }
.hero p { font-size: 20px; color: var(--text-secondary); margin-bottom: 40px; font-weight: 600; }

.btn-group { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.btn { padding: 16px 40px; border-radius: 16px; font-size: 16px; font-weight: 800; cursor: pointer; transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); display: inline-flex; align-items: center; justify-content: center; text-transform: uppercase; letter-spacing: 1px; }
.btn-primary { background: var(--ig-gradient); color: #fff; box-shadow: var(--shadow-btn); border: none; }
.btn-primary:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(214, 36, 159, 0.4); }
.btn-secondary { background: var(--bg-primary); color: var(--brand-blue); box-shadow: var(--shadow-3d); border: 1px solid rgba(255,255,255,0.5); }
.btn-secondary:hover { box-shadow: var(--shadow-3d-inset); transform: scale(0.98); }

/* Stats - 3D Blocks */
.stats { display: flex; justify-content: center; gap: 30px; padding: 0 20px 80px; flex-wrap: wrap; max-width: 1100px; margin: 0 auto; }
.stat-box { background: var(--bg-primary); box-shadow: var(--shadow-3d); border-radius: 20px; padding: 30px; text-align: center; flex: 1; min-width: 200px; border: 2px solid #fff; }
.stat-box h3 { font-size: 38px; font-weight: 900; margin-bottom: 5px; background: var(--ig-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-box p { font-size: 14px; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }

/* Sections */
.container { max-width: 1200px; margin: 0 auto; padding: 40px 20px; }
.section-title { font-size: 36px; font-weight: 900; text-align: center; margin-bottom: 60px; color: var(--text-primary); text-shadow: 1px 1px 2px rgba(0,0,0,0.05); }

/* About - 3D Panel */
.about-panel { background: var(--bg-primary); box-shadow: var(--shadow-3d); border-radius: 30px; padding: 60px; text-align: center; margin-bottom: 100px; border: 2px solid #fff; }
.about-panel p { font-size: 18px; color: var(--text-secondary); line-height: 1.8; font-weight: 600; margin-bottom: 20px; max-width: 800px; margin-inline: auto; }
.about-panel p:last-child { margin-bottom: 0; }

/* Features - 3D Cards */
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 40px; margin-bottom: 100px; }
.feat-card { background: var(--bg-primary); box-shadow: var(--shadow-3d); padding: 40px 30px; border-radius: 24px; transition: 0.3s; border: 2px solid #fff; text-align: center; }
.feat-card:hover { transform: translateY(-10px); box-shadow: 10px 10px 25px rgba(0,0,0,0.15), -10px -10px 25px rgba(255,255,255,1); }
.feat-icon-3d { font-size: 48px; margin-bottom: 20px; display: inline-block; filter: drop-shadow(2px 4px 6px rgba(0,0,0,0.15)); }
.feat-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 12px; color: var(--brand-blue); }
.feat-card p { font-size: 15px; color: var(--text-secondary); font-weight: 600; }

/* 3D Image Showcase */
.showcase-3d { background: var(--bg-primary); box-shadow: var(--shadow-3d); border-radius: 30px; padding: 20px; margin-bottom: 100px; border: 2px solid #fff; transform: perspective(1000px) rotateX(2deg); transition: 0.5s; }
.showcase-3d:hover { transform: perspective(1000px) rotateX(0deg); }
.showcase-img { width: 100%; display: block; border-radius: 20px; }

/* Guide - Inner shadow steps */
.guide-list { max-width: 900px; margin: 0 auto 100px; }
.guide-item { display: flex; align-items: center; gap: 30px; background: var(--bg-primary); box-shadow: var(--shadow-3d-inset); padding: 30px 40px; border-radius: 20px; margin-bottom: 25px; border: 1px solid #fff; }
.guide-num { font-size: 48px; font-weight: 900; background: var(--ig-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; filter: drop-shadow(2px 2px 2px rgba(0,0,0,0.1)); min-width: 60px; text-align: center; }
.guide-info h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.guide-info p { font-size: 15px; color: var(--text-secondary); font-weight: 600; }

/* FAQ - Floating strips */
.faq-wrap { max-width: 800px; margin: 0 auto 100px; }
.faq-box { background: var(--bg-primary); box-shadow: var(--shadow-3d); border-radius: 16px; margin-bottom: 20px; padding: 25px 30px; border: 2px solid #fff; transition: 0.3s; }
.faq-box:hover { transform: translateX(5px); }
.faq-q { font-size: 18px; font-weight: 800; margin-bottom: 12px; color: var(--brand-pink); display: flex; gap: 15px; align-items: flex-start; }
.faq-q::before { content: 'Q.'; font-size: 24px; line-height: 1; }
.faq-a { font-size: 15px; color: var(--text-secondary); font-weight: 600; padding-left: 35px; line-height: 1.7; }

/* Footer */
.footer { background: var(--bg-primary); box-shadow: 0 -5px 15px rgba(0,0,0,0.05); padding: 60px 20px; text-align: center; }
.footer-links { display: flex; justify-content: center; gap: 40px; margin-bottom: 30px; flex-wrap: wrap; }
.footer-links a { color: var(--text-secondary); font-size: 15px; font-weight: 800; text-transform: uppercase; }
.footer-links a:hover { color: var(--brand-blue); }
.footer-copy { color: #999; font-size: 14px; font-weight: 600; }

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 42px; }
    .btn-group { flex-direction: column; padding: 0 20px; }
    .btn { width: 100%; }
    .guide-item { flex-direction: column; text-align: center; gap: 15px; padding: 30px 20px; }
}