:root {
    --text-primary: #111111;
    --text-secondary: #717171;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --color-accent: #0095f6;
    --color-accent-hover: #1877f2;
    --border-color: #e5e5e5;
    
    --ig-gradient: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    --shadow-mockup: 0 30px 60px rgba(0, 0, 0, 0.12);
    --shadow-btn: 0 8px 20px 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(--bg-primary); color: var(--text-primary); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
ul { list-style: none; }

/* Navbar */
.nav { position: sticky; top: 0; z-index: 1000; background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); padding: 15px 5%; display: flex; justify-content: space-between; align-items: center; height: 72px; }
.nav-brand { font-size: 24px; font-weight: 800; background: var(--ig-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; font-family: 'Comic Sans MS', cursive, sans-serif; letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--text-secondary); transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-btn { background: var(--color-accent) !important; color: #fff !important; padding: 10px 24px; border-radius: 8px; font-weight: 600; font-size: 14px; }
.nav-btn:hover { background: var(--color-accent-hover) !important; }

/* Hero Section (Mockup + Button Combo) */
.hero { max-width: 1200px; margin: 0 auto; padding: 60px 20px 100px; display: flex; align-items: center; justify-content: space-between; gap: 60px; min-height: 85vh; }
.hero-content { flex: 1; max-width: 540px; }
.hero-tag { display: inline-block; padding: 6px 16px; background: var(--bg-secondary); border-radius: 20px; font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 24px; border: 1px solid var(--border-color); }
.hero h1 { font-size: 56px; font-weight: 800; line-height: 1.1; margin-bottom: 24px; letter-spacing: -1.5px; }
.hero h1 span { background: var(--ig-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 18px; color: var(--text-secondary); margin-bottom: 40px; }

/* Big Download Buttons */
.download-actions { display: flex; flex-direction: column; gap: 16px; }
.btn-dl { display: flex; align-items: center; justify-content: center; gap: 12px; width: 100%; max-width: 320px; padding: 16px 24px; border-radius: 12px; font-size: 16px; font-weight: 600; cursor: pointer; border: 1px solid transparent; box-shadow: var(--shadow-btn); transition: transform 0.2s, box-shadow 0.2s; }
.btn-dl:hover { transform: translateY(-3px); box-shadow: 0 12px 24px rgba(0,0,0,0.12); }
.btn-desktop { background: var(--text-primary); color: #fff; }
.btn-mobile { background: var(--bg-primary); color: var(--text-primary); border-color: var(--border-color); }
.btn-dl-sub { font-size: 13px; color: var(--text-secondary); margin-top: 12px; display: block; }

/* Mobile Mockup */
.hero-mockup-wrapper { flex: 1; display: flex; justify-content: center; position: relative; perspective: 1000px; }
.phone-mockup { width: 320px; height: 650px; background: #000; border-radius: 40px; border: 12px solid #111; position: relative; box-shadow: var(--shadow-mockup); overflow: hidden; transform: rotateY(-15deg) rotateX(5deg); transition: transform 0.5s ease; }
.phone-mockup:hover { transform: rotateY(-5deg) rotateX(2deg) translateY(-10px); }
.phone-mockup::before { content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 120px; height: 25px; background: #111; border-bottom-left-radius: 15px; border-bottom-right-radius: 15px; z-index: 10; }
.phone-mockup img { width: 100%; height: 100%; object-fit: cover; }

/* Stats Bar */
.stats { border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); background: var(--bg-secondary); }
.stats-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; padding: 60px 20px; flex-wrap: wrap; gap: 30px; }
.stat-item { text-align: center; flex: 1; min-width: 200px; }
.stat-item h3 { font-size: 42px; font-weight: 800; margin-bottom: 8px; color: var(--text-primary); letter-spacing: -1px; }
.stat-item p { font-size: 13px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }

/* General Container & Sections */
.section { padding: 100px 20px; }
.container { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 36px; font-weight: 800; letter-spacing: -1px; margin-bottom: 16px; }

/* About Box */
.about-box { max-width: 800px; margin: 0 auto; text-align: center; background: var(--bg-secondary); padding: 60px; border-radius: 24px; border: 1px solid var(--border-color); }
.about-box p { font-size: 18px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 24px; }
.about-box p:last-child { margin-bottom: 0; }

/* Feature Grid */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.feature-card { padding: 40px; background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 20px; transition: 0.3s; }
.feature-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-btn); transform: translateY(-5px); }
.feature-icon { width: 56px; height: 56px; border-radius: 14px; background: rgba(0, 149, 246, 0.1); color: var(--color-accent); display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 24px; }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { font-size: 15px; color: var(--text-secondary); line-height: 1.6; }

/* Steps */
.step-container { display: flex; flex-direction: column; gap: 20px; max-width: 800px; margin: 0 auto; }
.step-card { display: flex; align-items: center; gap: 24px; padding: 30px; background: var(--bg-secondary); border-radius: 16px; border: 1px solid var(--border-color); }
.step-num { font-size: 48px; font-weight: 900; color: transparent; -webkit-text-stroke: 1px var(--border-color); background: var(--ig-gradient); -webkit-background-clip: text; }
.step-text h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.step-text p { font-size: 15px; color: var(--text-secondary); }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { padding: 30px 0; border-bottom: 1px solid var(--border-color); }
.faq-item:first-child { border-top: 1px solid var(--border-color); }
.faq-q { font-size: 18px; font-weight: 700; margin-bottom: 12px; display: flex; gap: 12px; }
.faq-q::before { content: 'Q.'; color: var(--color-accent); }
.faq-a { font-size: 15px; color: var(--text-secondary); padding-left: 30px; line-height: 1.7; }

/* Footer */
.footer { background: var(--bg-secondary); padding: 60px 20px 40px; border-top: 1px solid var(--border-color); text-align: center; }
.footer-links { display: flex; justify-content: center; gap: 32px; margin-bottom: 30px; flex-wrap: wrap; }
.footer-links a { font-size: 14px; font-weight: 600; color: var(--text-secondary); }
.footer-links a:hover { color: var(--text-primary); }
.footer-copy { color: #999; font-size: 13px; }

/* Showcases */
.img-full { width: 100%; border-radius: 24px; display: block; border: 1px solid var(--border-color); }

@media (max-width: 900px) {
    .hero { flex-direction: column; text-align: center; padding-top: 40px; }
    .hero-content { max-width: 100%; }
    .download-actions { align-items: center; }
    .phone-mockup { transform: rotateY(0) rotateX(0); }
}
@media (max-width: 600px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 40px; }
    .stats-container { flex-direction: column; gap: 40px; }
}