:root {
    --ig-dark: #121212;
    --ig-light: #fafafa;
    --ig-blue: #0095f6;
    --ig-gradient: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    --text-main: #262626;
    --text-muted: #8e8e8e;
    --border-color: #dbdbdb;
    --card-shadow: 0 10px 30px rgba(0,0,0,0.08);
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
body { background-color: var(--ig-light); color: var(--text-main); line-height: 1.6; }
a { text-decoration: none; color: inherit; }

/* Computer Screen Perspective Nav */
.nav { background: rgba(255,255,255,0.9); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 100; display: flex; justify-content: space-between; align-items: center; padding: 15px 5%; border-bottom: 1px solid var(--border-color); }
.nav-brand { font-size: 24px; font-weight: 800; background: var(--ig-gradient); -webkit-background-clip: text; color: transparent; }
.nav-links a { margin-left: 20px; font-weight: 600; font-size: 14px; transition: color 0.2s; }
.nav-links a:hover { color: var(--ig-blue); }

/* Perspective Hero */
.hero { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 85vh; background: #ffffff; padding: 60px 20px; text-align: center; position: relative; overflow: hidden; perspective: 1000px; }
.hero-content { position: relative; z-index: 2; transform: translateZ(50px); max-width: 800px; margin-bottom: 40px; }
.hero h1 { font-size: 52px; font-weight: 900; margin-bottom: 15px; letter-spacing: -1px; }
.hero p { font-size: 18px; color: var(--text-muted); font-weight: 500; }
.btn-group { display: flex; gap: 15px; justify-content: center; margin-top: 30px; }
.btn { padding: 14px 32px; border-radius: 6px; font-size: 16px; font-weight: bold; cursor: pointer; transition: 0.3s; border: none; }
.btn-primary { background: var(--ig-blue); color: white; box-shadow: 0 4px 15px rgba(0, 149, 246, 0.3); }
.btn-primary:hover { background: #0077c5; transform: translateY(-2px); }
.btn-secondary { background: #EFEFEF; color: var(--text-main); }
.btn-secondary:hover { background: #DBDBDB; transform: translateY(-2px); }

/* Perspective Mockup Image */
.hero-mockup { width: 80%; max-width: 900px; transform: rotateX(15deg) rotateY(-5deg) rotateZ(2deg) scale(1); box-shadow: -20px 30px 60px rgba(0,0,0,0.15); border-radius: 12px; transition: 0.5s ease-out; z-index: 1; border: 1px solid var(--border-color); }
.hero:hover .hero-mockup { transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg) scale(1.02); box-shadow: 0 20px 40px rgba(0,0,0,0.1); }

/* Data Bar */
.data-bar { display: flex; justify-content: space-evenly; flex-wrap: wrap; padding: 40px 20px; background: var(--ig-dark); color: white; }
.data-item { text-align: center; }
.data-item h3 { font-size: 32px; font-weight: 800; background: var(--ig-gradient); -webkit-background-clip: text; color: transparent; margin-bottom: 5px; }
.data-item p { font-size: 14px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: #a0a0a0; }

/* Grid Sections */
.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; }
.section-title { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 50px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.card { background: white; padding: 30px; border-radius: 12px; box-shadow: var(--card-shadow); border: 1px solid var(--border-color); transition: 0.3s; position: relative; }
.card:hover { transform: translateY(-5px); box-shadow: 0 15px 40px rgba(0,0,0,0.1); border-color: var(--ig-blue); }
.card::before { content: ""; position: absolute; left: 30px; top: 30px; width: 40px; height: 4px; background: var(--ig-gradient); border-radius: 2px; }
.card h3 { font-size: 20px; font-weight: 700; margin: 20px 0 10px; }
.card p { font-size: 14px; color: var(--text-muted); }

/* Standard Image */
.img-fluid { max-width: 100%; display: block; margin: 40px auto 0; border-radius: 12px; box-shadow: var(--card-shadow); }

/* FAQ List */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: white; padding: 25px; border-radius: 12px; border: 1px solid var(--border-color); margin-bottom: 15px; box-shadow: 0 2px 8px rgba(0,0,0,0.02); }
.faq-item h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--ig-blue); }
.faq-item p { font-size: 14px; color: var(--text-muted); }

/* Guide */
.guide-container { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; }
.guide-step { background: white; border: 1px solid var(--border-color); padding: 30px 20px; border-radius: 12px; flex: 1; min-width: 220px; text-align: center; box-shadow: 0 4px 12px rgba(0,0,0,0.03); }
.guide-step .num { display: inline-block; font-size: 24px; font-weight: 800; color: var(--ig-blue); margin-bottom: 15px; background: rgba(0,149,246,0.1); width: 50px; height: 50px; line-height: 50px; border-radius: 50%; }
.guide-step h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.guide-step p { font-size: 13px; color: var(--text-muted); }

/* Footer */
.footer { padding: 40px 20px; text-align: center; background: white; border-top: 1px solid var(--border-color); }
.footer-links { display: flex; justify-content: center; gap: 20px; margin-bottom: 15px; }
.footer-links a { font-size: 14px; font-weight: 600; color: var(--text-muted); transition: 0.2s; }
.footer-links a:hover { color: var(--ig-blue); }
.footer p { font-size: 12px; color: #a0a0a0; }