:root {
    --ig-orange: #f09433;
    --ig-red: #dc2743;
    --ig-purple: #bc1888;
    --bg-main: #fafafa;
    --text-dark: #262626;
    --text-muted: #8e8e8e;
    --border: #dbdbdb;
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
body { background: var(--bg-main); color: var(--text-dark); line-height: 1.6; }
a { text-decoration: none; color: inherit; }

/* Mobile App Promo Style Nav */
.nav { background: white; border-bottom: 1px solid var(--border); padding: 15px 20px; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 10px rgba(0,0,0,0.03); }
.nav-brand { font-size: 22px; font-weight: 800; background: linear-gradient(45deg, var(--ig-orange), var(--ig-red), var(--ig-purple)); -webkit-background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 15px; }
.nav-links a { font-size: 14px; font-weight: 600; color: var(--text-dark); }
.nav-links a:hover { color: var(--ig-red); }

/* Long Scroll Promo Container */
.promo-wrapper { max-width: 600px; margin: 0 auto; background: white; box-shadow: 0 0 20px rgba(0,0,0,0.05); overflow: hidden; min-height: 100vh; }

/* Hero */
.hero { text-align: center; padding: 50px 20px; background: linear-gradient(180deg, #fff 0%, #fff0f5 100%); }
.hero h1 { font-size: 32px; font-weight: 800; margin-bottom: 15px; line-height: 1.2; }
.hero p { font-size: 16px; color: var(--text-muted); margin-bottom: 30px; }
.btn-group { display: flex; flex-direction: column; gap: 15px; padding: 0 20px; }
.btn { width: 100%; padding: 16px; border-radius: 30px; font-size: 16px; font-weight: 700; text-align: center; transition: transform 0.2s; border: none; cursor: pointer; }
.btn-primary { background: linear-gradient(45deg, var(--ig-orange), var(--ig-red), var(--ig-purple)); color: white; box-shadow: 0 8px 15px rgba(220,39,67,0.3); }
.btn-primary:hover { transform: scale(1.02); }
.btn-secondary { background: white; color: var(--text-dark); border: 2px solid var(--border); }
.btn-secondary:hover { border-color: var(--text-dark); }

/* Data Bar */
.data-bar { display: flex; flex-wrap: wrap; padding: 30px 20px; background: var(--text-dark); color: white; gap: 20px; justify-content: space-around; }
.data-item { text-align: center; width: 40%; }
.data-item h3 { font-size: 24px; font-weight: 800; color: #ffb6c1; }
.data-item p { font-size: 12px; }

/* Sections */
.section { padding: 40px 20px; border-bottom: 10px solid var(--bg-main); }
.section-title { font-size: 24px; font-weight: 800; margin-bottom: 25px; text-align: center; }
.section-text { font-size: 15px; color: var(--text-muted); text-align: center; margin-bottom: 20px; }

/* Image Style */
.img-fluid { width: 100%; height: auto; border-radius: 16px; margin: 20px 0; display: block; box-shadow: 0 10px 20px rgba(0,0,0,0.1); }

/* Cards (Vertical Stack for Mobile Promo) */
.card-stack { display: flex; flex-direction: column; gap: 20px; }
.card { background: var(--bg-main); padding: 25px; border-radius: 16px; display: flex; flex-direction: column; align-items: center; text-align: center; }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
.card p { font-size: 14px; color: var(--text-muted); }

/* FAQ */
.faq-item { margin-bottom: 20px; padding: 20px; background: var(--bg-main); border-radius: 12px; }
.faq-item h3 { font-size: 15px; font-weight: 700; margin-bottom: 8px; color: var(--ig-red); }
.faq-item p { font-size: 14px; color: var(--text-muted); }

/* Guide Steps */
.guide-step { display: flex; align-items: center; gap: 15px; margin-bottom: 20px; padding: 15px; background: var(--bg-main); border-radius: 12px; }
.step-num { width: 40px; height: 40px; background: linear-gradient(45deg, var(--ig-orange), var(--ig-red)); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 18px; flex-shrink: 0; }
.guide-step h3 { font-size: 16px; margin-bottom: 4px; }
.guide-step p { font-size: 13px; color: var(--text-muted); }

/* Footer */
.footer { padding: 40px 20px; text-align: center; background: white; }
.footer-links { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; margin-bottom: 20px; }
.footer-links a { font-size: 13px; font-weight: 600; color: var(--text-muted); }
.footer p { font-size: 12px; color: #ccc; }