:root {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --text-primary: #1c1e21;
    --text-secondary: #606770;
    --border-color: #ced4da;
    
    /* Flat Vector Accents */
    --vector-blue: #4dabf7;
    --vector-pink: #f06595;
    --vector-yellow: #fcc419;
    --vector-green: #51cf66;
    --vector-purple: #b197fc;
    
    --shadow-flat: 6px 6px 0px rgba(28, 30, 33, 0.15);
    --border-thick: 3px solid var(--text-primary);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Varela Round', 'Comic Sans MS', 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; }

/* Vector Pattern Background */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background-image: 
        radial-gradient(circle at 10% 20%, var(--vector-blue) 4px, transparent 4px),
        radial-gradient(circle at 90% 80%, var(--vector-pink) 6px, transparent 6px),
        radial-gradient(circle at 80% 20%, var(--vector-yellow) 5px, transparent 5px),
        radial-gradient(circle at 20% 80%, var(--vector-green) 4px, transparent 4px);
    background-size: 150px 150px;
    opacity: 0.4;
    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; }
.nav-brand { font-size: 28px; font-weight: 900; color: var(--text-primary); letter-spacing: -1px; text-transform: uppercase; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { font-size: 16px; font-weight: 700; color: var(--text-secondary); border: 2px solid transparent; padding: 5px 10px; border-radius: 8px; }
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); border-color: var(--text-primary); background: #f8f9fa; }
.nav-btn { background: var(--vector-yellow); color: var(--text-primary) !important; padding: 10px 24px !important; border: var(--border-thick) !important; border-radius: 50px !important; box-shadow: var(--shadow-flat); }
.nav-btn:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0px rgba(28, 30, 33, 0.2); }

/* Hero */
.hero { text-align: center; padding: 100px 20px 80px; max-width: 900px; margin: 0 auto; position: relative; }
.hero-tag { display: inline-block; padding: 8px 24px; background: var(--vector-pink); color: #fff; border: var(--border-thick); border-radius: 30px; font-size: 14px; font-weight: 800; box-shadow: var(--shadow-flat); margin-bottom: 30px; transform: rotate(-3deg); }
.hero h1 { font-size: 64px; font-weight: 900; line-height: 1.1; margin-bottom: 24px; }
.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: 18px; font-weight: 800; cursor: pointer; transition: 0.2s; border: var(--border-thick); box-shadow: var(--shadow-flat); display: inline-flex; align-items: center; justify-content: center; }
.btn-primary { background: var(--vector-blue); color: #fff; }
.btn-primary:hover { background: #339af0; transform: translate(-2px, -2px); box-shadow: 8px 8px 0px rgba(28, 30, 33, 0.2); }
.btn-secondary { background: var(--bg-secondary); color: var(--text-primary); }
.btn-secondary:hover { background: #f1f3f5; transform: translate(-2px, -2px); box-shadow: 8px 8px 0px rgba(28, 30, 33, 0.2); }

/* Stats - Vector 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: 20px; padding: 30px; text-align: center; flex: 1; min-width: 200px; box-shadow: var(--shadow-flat); }
.stat-box:nth-child(even) { transform: translateY(15px); }
.stat-box h3 { font-size: 42px; font-weight: 900; margin-bottom: 5px; color: var(--vector-purple); }
.stat-box p { font-size: 16px; font-weight: 700; color: var(--text-secondary); }

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 40px 20px; }
.section-title { font-size: 42px; font-weight: 900; text-align: center; margin-bottom: 60px; text-shadow: 2px 2px 0px #fff; }

/* About - Cartoon Panel */
.about-panel { background: var(--bg-secondary); border: var(--border-thick); border-radius: 30px; padding: 60px; text-align: center; margin-bottom: 100px; box-shadow: var(--shadow-flat); position: relative; }
.about-panel::before { content: 'i'; position: absolute; top: -25px; left: 50%; transform: translateX(-50%); width: 50px; height: 50px; background: var(--vector-green); border: var(--border-thick); border-radius: 50%; font-size: 30px; font-weight: 900; color: #fff; display: flex; align-items: center; justify-content: center; }
.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: 20px; box-shadow: var(--shadow-flat); text-align: center; transition: 0.2s; }
.feat-card:hover { transform: translate(-4px, -4px); box-shadow: 10px 10px 0px rgba(28, 30, 33, 0.2); }
.feat-icon-wrap { width: 80px; height: 80px; background: var(--vector-yellow); border: var(--border-thick); border-radius: 50%; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; font-size: 36px; }
.feat-card:nth-child(2) .feat-icon-wrap { background: var(--vector-pink); }
.feat-card:nth-child(3) .feat-icon-wrap { background: var(--vector-blue); }
.feat-card:nth-child(4) .feat-icon-wrap { background: var(--vector-green); }
.feat-card:nth-child(5) .feat-icon-wrap { background: var(--vector-purple); }
.feat-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 12px; }
.feat-card p { font-size: 16px; color: var(--text-secondary); font-weight: 600; }

/* Visual Break - Vector Frame */
.showcase-vector { background: var(--vector-blue); border: var(--border-thick); border-radius: 30px; padding: 15px; margin-bottom: 100px; box-shadow: var(--shadow-flat); transform: rotate(1deg); }
.showcase-img { width: 100%; display: block; border-radius: 15px; border: var(--border-thick); background: #fff; }

/* Guide - Step blocks */
.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: 30px; }
.guide-num { font-size: 48px; font-weight: 900; color: var(--vector-pink); min-width: 60px; text-align: center; text-shadow: 3px 3px 0px #fff, 4px 4px 0px var(--text-primary); }
.guide-info h3 { font-size: 22px; font-weight: 800; 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: 20px; margin-bottom: 25px; padding: 30px; transition: 0.2s; }
.faq-box:hover { transform: translateX(10px); }
.faq-q { font-size: 20px; font-weight: 800; margin-bottom: 15px; color: var(--text-primary); display: flex; gap: 15px; align-items: flex-start; }
.faq-q::before { content: 'Q'; background: var(--vector-yellow); color: var(--text-primary); border: 2px solid var(--text-primary); width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 900; flex-shrink: 0; }
.faq-a { font-size: 16px; color: var(--text-secondary); font-weight: 600; padding-left: 50px; line-height: 1.7; }

/* Footer */
.footer { background: var(--text-primary); color: #fff; padding: 60px 20px; text-align: center; border-top: 5px solid var(--vector-pink); }
.footer-links { display: flex; justify-content: center; gap: 30px; margin-bottom: 30px; flex-wrap: wrap; }
.footer-links a { color: #f1f3f5; font-size: 16px; font-weight: 700; border: 2px solid transparent; padding: 5px 15px; border-radius: 8px; }
.footer-links a:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.footer-copy { color: #adb5bd; 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%; }
    .stat-box:nth-child(even) { transform: none; }
    .guide-item { flex-direction: column; text-align: center; gap: 15px; padding: 30px 20px; }
    .faq-q::before { width: 30px; height: 30px; font-size: 16px; }
    .faq-a { padding-left: 0; margin-top: 15px; }
}