:root {
    --bg-primary: #f5f8ff; /* Soft blue-tinted white */
    --bg-secondary: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --border-color: #e2e8f0;
    
    /* Vibrant Flat Colors */
    --brand-pink: #ED64A6;
    --brand-orange: #ED8936;
    --brand-yellow: #ECC94B;
    --brand-blue: #4299E1;
    --brand-purple: #9F7AEA;
    
    --ig-gradient: linear-gradient(135deg, var(--brand-orange), var(--brand-pink), var(--brand-purple));
    
    --shadow-flat: 4px 4px 0px rgba(0,0,0,0.1); /* Hard shadow for flat design */
    --shadow-flat-hover: 8px 8px 0px rgba(0,0,0,0.15);
    
    --border-radius: 16px;
    --border-thick: 3px solid var(--text-primary);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Quicksand', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
body { background-color: var(--bg-primary); color: var(--text-primary); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.2s; }
ul { list-style: none; }

/* Background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 20px 20px;
    z-index: -1;
    pointer-events: none;
}

/* Navbar */
.nav { background: var(--bg-secondary); border-bottom: var(--border-thick); padding: 15px 5%; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 1000; box-shadow: 0 4px 0 rgba(0,0,0,0.05); }
.nav-brand { font-size: 28px; font-weight: 800; color: var(--text-primary); letter-spacing: -1px; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { font-size: 16px; font-weight: 700; color: var(--text-secondary); }
.nav-links a:hover, .nav-links a.active { color: var(--brand-pink); }
.nav-btn { background: var(--brand-blue); color: #fff !important; padding: 10px 24px; border-radius: 50px; font-weight: 800; border: 2px solid var(--text-primary); box-shadow: 2px 2px 0 var(--text-primary); }
.nav-btn:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--text-primary); }

/* Hero */
.hero { text-align: center; padding: 100px 20px 80px; max-width: 900px; margin: 0 auto; position: relative; }
.hero-tag { display: inline-block; padding: 8px 20px; background: var(--brand-yellow); color: var(--text-primary); border-radius: 50px; font-size: 14px; font-weight: 800; border: 2px solid var(--text-primary); box-shadow: 2px 2px 0 var(--text-primary); margin-bottom: 30px; text-transform: uppercase; letter-spacing: 1px; }
.hero h1 { font-size: 64px; font-weight: 900; line-height: 1.1; margin-bottom: 24px; letter-spacing: -2px; }
.hero h1 span { color: var(--brand-pink); }
.hero p { font-size: 20px; color: var(--text-secondary); margin-bottom: 40px; font-weight: 600; max-width: 600px; margin-inline: auto; }

.btn-group { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.btn { padding: 16px 40px; border-radius: 50px; font-size: 16px; font-weight: 800; cursor: pointer; transition: 0.2s; border: var(--border-thick); display: inline-flex; align-items: center; justify-content: center; }
.btn-primary { background: var(--brand-pink); color: #fff; box-shadow: var(--shadow-flat); }
.btn-primary:hover { transform: translate(-4px, -4px); box-shadow: var(--shadow-flat-hover); background: #f672b1; }
.btn-secondary { background: var(--bg-secondary); color: var(--text-primary); box-shadow: var(--shadow-flat); }
.btn-secondary:hover { transform: translate(-4px, -4px); box-shadow: var(--shadow-flat-hover); background: #fdfdfd; }

/* Stats - Colorful 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-secondary); border: var(--border-thick); border-radius: var(--border-radius); padding: 30px; text-align: center; flex: 1; min-width: 200px; box-shadow: var(--shadow-flat); }
.stat-box:nth-child(1) { background: #ffe4e6; }
.stat-box:nth-child(2) { background: #fff3cd; }
.stat-box:nth-child(3) { background: #e0e7ff; }
.stat-box:nth-child(4) { background: #f3e8ff; }
.stat-box h3 { font-size: 40px; font-weight: 900; margin-bottom: 5px; color: var(--text-primary); }
.stat-box p { font-size: 15px; font-weight: 800; color: var(--text-secondary); text-transform: uppercase; }

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

/* About - Cartoon style container */
.about-panel { background: var(--bg-secondary); border: var(--border-thick); border-radius: 24px; padding: 60px; text-align: center; margin-bottom: 100px; box-shadow: var(--shadow-flat-hover); position: relative; }
.about-panel::before { content: 'i'; position: absolute; top: -20px; left: 50%; transform: translateX(-50%); width: 40px; height: 40px; background: var(--brand-yellow); border: var(--border-thick); border-radius: 50%; font-weight: 900; font-size: 24px; display: flex; align-items: center; justify-content: center; box-shadow: 2px 2px 0 var(--text-primary); }
.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 - Flat Grid */
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; margin-bottom: 100px; }
.feat-card { background: var(--bg-secondary); border: var(--border-thick); padding: 40px 30px; border-radius: 24px; box-shadow: var(--shadow-flat); transition: 0.2s; text-align: center; }
.feat-card:hover { transform: translate(-4px, -4px); box-shadow: var(--shadow-flat-hover); }
.feat-icon-wrap { width: 80px; height: 80px; background: var(--brand-blue); border: 2px solid var(--text-primary); border-radius: 50%; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; font-size: 36px; box-shadow: 2px 2px 0 var(--text-primary); }
.feat-card:nth-child(2) .feat-icon-wrap { background: var(--brand-pink); }
.feat-card:nth-child(3) .feat-icon-wrap { background: var(--brand-yellow); }
.feat-card:nth-child(4) .feat-icon-wrap { background: var(--brand-orange); }
.feat-card:nth-child(5) .feat-icon-wrap { background: var(--brand-purple); }
.feat-card:nth-child(6) .feat-icon-wrap { background: #48bb78; }
.feat-card h3 { font-size: 22px; font-weight: 900; margin-bottom: 12px; }
.feat-card p { font-size: 16px; color: var(--text-secondary); font-weight: 600; }

/* Visual Showcase */
.showcase-vector { background: var(--brand-purple); border: var(--border-thick); border-radius: 24px; padding: 10px; margin-bottom: 100px; box-shadow: var(--shadow-flat-hover); }
.showcase-img { width: 100%; display: block; border-radius: 14px; border: 2px solid var(--text-primary); }

/* Guide - Step-by-step vector style */
.guide-list { max-width: 900px; margin: 0 auto 100px; }
.guide-item { display: flex; align-items: center; gap: 30px; background: var(--bg-secondary); border: var(--border-thick); box-shadow: var(--shadow-flat); padding: 30px 40px; border-radius: 20px; margin-bottom: 25px; transition: 0.2s; }
.guide-item:hover { transform: translateX(10px); box-shadow: var(--shadow-flat-hover); }
.guide-num { font-size: 40px; font-weight: 900; color: var(--brand-orange); min-width: 60px; text-shadow: 2px 2px 0 var(--text-primary); -webkit-text-stroke: 1px var(--text-primary); }
.guide-info h3 { font-size: 22px; font-weight: 900; margin-bottom: 8px; }
.guide-info p { font-size: 16px; color: var(--text-secondary); font-weight: 600; }

/* FAQ - Playful Accordion */
.faq-wrap { max-width: 800px; margin: 0 auto 100px; }
.faq-box { background: var(--bg-secondary); border: var(--border-thick); box-shadow: var(--shadow-flat); border-radius: 16px; margin-bottom: 20px; padding: 25px 30px; transition: 0.2s; }
.faq-box:hover { box-shadow: var(--shadow-flat-hover); transform: translateY(-2px); }
.faq-q { font-size: 20px; font-weight: 800; margin-bottom: 12px; color: var(--text-primary); display: flex; gap: 15px; align-items: flex-start; }
.faq-q::before { content: '?'; color: var(--brand-pink); font-size: 28px; font-weight: 900; line-height: 1; text-shadow: 2px 2px 0 var(--text-primary); }
.faq-a { font-size: 16px; color: var(--text-secondary); font-weight: 600; padding-left: 40px; line-height: 1.7; }

/* Footer */
.footer { background: var(--text-primary); color: #fff; padding: 60px 20px; text-align: center; border-top: 4px solid var(--brand-pink); }
.footer-links { display: flex; justify-content: center; gap: 40px; margin-bottom: 30px; flex-wrap: wrap; }
.footer-links a { color: #cbd5e0; font-size: 16px; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; }
.footer-links a:hover { color: var(--brand-yellow); }
.footer-copy { color: #a0aec0; font-size: 14px; font-weight: 600; }

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 48px; }
    .btn-group { flex-direction: column; padding: 0 20px; }
    .btn { width: 100%; }
    .guide-item { flex-direction: column; text-align: center; gap: 15px; padding: 30px 20px; }
    .faq-q::before { font-size: 24px; }
    .faq-a { padding-left: 0; margin-top: 10px; }
}