:root {
    --primary: #0A84FF;
    --accent: #5AC8FA;
    --destructive: #FF453A;
    --success: #32D74B;
    --warning: #FF9F0A;
    --bg: #000000;
    --card-bg: rgba(28, 28, 30, 0.6);
    --text: #FFFFFF;
    --text-dim: #8E8E93;
    --max-w: 1200px;
    --nav-h: 70px;
}

/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, Roboto, sans-serif; }
body { background: var(--bg); color: var(--text); overflow-x: hidden; }
.no-select { user-select: none; -webkit-user-select: none; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { pointer-events: none; }

/* Canvas & Loader */
#bg-canvas { position: fixed; inset: 0; z-index: -1; }
.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); z-index: 2000; width: 0%; }
.loader-overlay { position: fixed; inset: 0; background: #000; z-index: 9999; display: flex; center; align-items: center; justify-content: center; }
.loader-icon { width: 80px; border-radius: 18px; margin-bottom: 10px; }
.loader-text { font-size: 1.2rem; font-weight: bold; text-align: center; }

/* Layout Utils */
.container { width: 90%; max-width: var(--max-w); margin: 0 auto; }
section { padding: 100px 0; position: relative; }
.glass-card { background: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.08); border-radius: 24px; box-shadow: 0 8px 32px rgba(0,0,0,0.3); transition: transform 0.3s; }
.glass-card:hover { transform: translateY(-5px); border-color: rgba(255,255,255,0.15); }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.section-header p { color: var(--text-dim); }

/* Nav */
.glass-nav { position: fixed; top: 0; width: 100%; height: var(--nav-h); z-index: 1000; transition: 0.3s; }
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 100%; width: 90%; max-width: var(--max-w); margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: bold; font-size: 1.2rem; }
.logo-img { width: 36px; border-radius: 8px; }
.nav-links { display: flex; gap: 2rem; }
.nav-links a:hover { color: var(--primary); }
.menu-toggle { display: none; font-size: 1.5rem; cursor: pointer; }
.btn-primary { background: var(--primary); padding: 0.5rem 1.2rem; border-radius: 20px; font-weight: 600; }

/* Hero */
.hero-section { min-height: 100vh; display: flex; align-items: center; padding-top: var(--nav-h); }
.hero-flex { display: flex; justify-content: space-between; align-items: center; width: 100%; gap: 2rem; }
.hero-text { flex: 1; max-width: 500px; }
.hero-title { font-size: 4rem; line-height: 1.1; margin: 1rem 0; background: linear-gradient(135deg, #fff, #888); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-badge { color: var(--accent); font-weight: bold; text-transform: uppercase; letter-spacing: 1px; font-size: 0.9rem; }
.subtitle { color: var(--text-dim); font-size: 1.2rem; line-height: 1.6; margin-bottom: 2rem; }
.btn-ios { background: rgba(255,255,255,0.1); padding: 0.8rem 1.5rem; border-radius: 12px; display: inline-flex; align-items: center; gap: 8px; }
.badge-pill { padding: 8px 16px; background: rgba(255,255,255,0.05); border-radius: 20px; color: var(--text-dim); border: 1px solid rgba(255,255,255,0.1); }

/* Phone Mockup */
.hero-visual { flex: 1; display: flex; justify-content: center; }
.phone-mockup { width: 300px; height: 600px; background: #000; border: 10px solid #222; border-radius: 40px; position: relative; box-shadow: 0 20px 50px rgba(0,0,0,0.5); transform-style: preserve-3d; perspective: 1000px; }
.screen { width: 100%; height: 100%; background: #111; border-radius: 30px; overflow: hidden; position: relative; }
.swiper-container { width: 100%; height: 100%; position: relative; }
.swiper-card { position: absolute; top: 10%; left: 5%; width: 90%; height: 70%; background: #222; border-radius: 20px; overflow: hidden; transform-origin: bottom center; will-change: transform; box-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.card-img { width: 100%; height: 100%; background-size: cover; background-position: center; }
.card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.8), transparent 40%); pointer-events: none; }
.card-info { position: absolute; bottom: 15px; width: 100%; padding: 0 20px; display: flex; justify-content: space-between; font-size: 0.9rem; pointer-events: none; }
.hand-hint { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); font-size: 2rem; opacity: 0; transition: 0.3s; background: rgba(0,0,0,0.5); padding: 15px; border-radius: 50%; backdrop-filter: blur(5px); }
.swiper-container:hover .hand-hint { opacity: 1; }
.app-ui-overlay { position: absolute; inset: 0; pointer-events: none; }
.app-bar-bottom { position: absolute; bottom: 0; width: 100%; height: 80px; display: flex; justify-content: space-around; align-items: center; background: linear-gradient(to top, rgba(0,0,0,0.8), transparent); font-size: 1.5rem; color: var(--text-dim); }
.action-icon { transition: 0.2s; }
.action-icon.active { color: var(--primary); transform: scale(1.2); }
.delete-hint.active { color: var(--destructive); }
.keep-hint.active { color: var(--success); }

/* Guide */
.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.guide-item { padding: 2rem; position: relative; overflow: hidden; }
.step-num { font-size: 4rem; font-weight: 900; color: rgba(255,255,255,0.03); position: absolute; top: -10px; right: 10px; }
.guide-icon { font-size: 2rem; color: var(--primary); margin-top: 1rem; }
.guide-icon.warning { color: var(--warning); }
.guide-icon.success { color: var(--success); }

/* Security */
.security-layout { display: flex; align-items: center; padding: 3rem; gap: 3rem; }
.security-text { flex: 2; }
.security-visual { flex: 1; display: flex; justify-content: center; position: relative; }
.security-icon { font-size: 6rem; color: var(--success); z-index: 1; }
.circle-anim { position: absolute; width: 100px; height: 100px; border: 2px solid var(--success); border-radius: 50%; animation: ping 2s infinite; }
@keyframes ping { 0% { transform: scale(1); opacity: 1; } 100% { transform: scale(2); opacity: 0; } }
.check-list li { margin-bottom: 0.8rem; display: flex; align-items: center; gap: 10px; color: var(--text-dim); }
.check-list i { color: var(--success); }

/* Features */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.feature-card { padding: 2rem; text-align: center; }
.feature-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.feature-icon.primary { color: var(--primary); }
.feature-icon.accent { color: var(--accent); }
.feature-icon.warning { color: var(--warning); }
.feature-icon.orange { color: #FF9500; }

/* Testimonials */
.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.testimonial-card { padding: 2rem; display: flex; flex-direction: column; align-items: center; text-align: center; }
.user-avatar { width: 60px; height: 60px; border-radius: 50%; background-size: cover; margin-bottom: 1rem; border: 2px solid var(--primary); }
.user-name { margin-top: 1rem; color: var(--text-dim); font-size: 0.9rem; }

/* Pricing */
.pricing-container { display: flex; justify-content: center; flex-wrap: wrap; gap: 1.5rem; }
.pricing-card { flex: 1; min-width: 250px; max-width: 320px; padding: 2rem; position: relative; display: flex; flex-direction: column; align-items: center; }
.pricing-card.popular { border-color: var(--warning); background: rgba(255, 159, 10, 0.08); }
.badge { position: absolute; top: -10px; background: var(--warning); padding: 4px 12px; border-radius: 10px; font-size: 0.8rem; color: #000; font-weight: bold; }
.price { font-size: 2rem; font-weight: bold; margin: 1rem 0; color: var(--primary); }
.pricing-card li { margin-bottom: 0.5rem; color: var(--text-dim); font-size: 0.9rem; display: flex; gap: 8px; }

/* Footer */
.footer-section { padding: 3rem 0; background: rgba(0,0,0,0.5); margin-top: 3rem; }
.footer-flex { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 2rem; }
.footer-contact h4 { margin-bottom: 0.5rem; }
.footer-contact p { color: var(--text-dim); margin-bottom: 0.3rem; display: flex; gap: 10px; align-items: center; }
.copyright { text-align: center; margin-top: 2rem; color: var(--text-dim); font-size: 0.8rem; width: 100%; }

/* Mobile Adapt */
@media (max-width: 768px) {
    .hero-flex { flex-direction: column; text-align: center; }
    .hero-title { font-size: 2.8rem; }
    .nav-links { display: none; } /* Mobile Menu implementation omitted for brevity */
    .menu-toggle { display: block; }
    .phone-mockup { width: 280px; height: 560px; }
    .security-layout { flex-direction: column; text-align: center; padding: 2rem; }
    .check-list { text-align: left; display: inline-block; }
}