:root{--color-primary: #007aff;--color-primary-dark: #0056b3;--color-warning: #ffcc00;--color-danger: #ff3b30;--color-success: #34c759;--color-bg: #ffffff;--color-bg-secondary: #f5f5f7;--color-text: #1d1d1f;--color-text-secondary: #86868b;--color-border: #d2d2d7;--max-width: 1200px;--header-height: 60px}@media(prefers-color-scheme:dark){:root{--color-bg: #000000;--color-bg-secondary: #1c1c1e;--color-text: #f5f5f7;--color-text-secondary: #98989d;--color-border: #38383a}}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--color-bg);color:var(--color-text);line-height:1.6}.app{min-height:100vh;display:flex;flex-direction:column}main{flex:1}.header{position:sticky;top:0;z-index:100;background-color:var(--color-bg);border-bottom:1px solid var(--color-border);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}.header-content{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:var(--header-height);display:flex;align-items:center;justify-content:space-between}.header-logo{font-size:1.25rem;font-weight:600;color:var(--color-text);text-decoration:none}.header-nav{display:flex;gap:24px}.header-nav a{color:var(--color-text-secondary);text-decoration:none;font-size:.875rem;transition:color .2s}.header-nav a:hover{color:var(--color-primary)}.footer{background-color:var(--color-bg-secondary);border-top:1px solid var(--color-border);padding:48px 24px}.footer-content{max-width:var(--max-width);margin:0 auto}.footer-links{display:flex;gap:24px;margin-bottom:24px;flex-wrap:wrap}.footer-links a{color:var(--color-text-secondary);text-decoration:none;font-size:.875rem}.footer-links a:hover{color:var(--color-primary)}.footer-copyright{color:var(--color-text-secondary);font-size:.75rem}.hero{padding:80px 24px;text-align:center;background:linear-gradient(180deg,var(--color-bg-secondary) 0%,var(--color-bg) 100%)}.hero-content{max-width:800px;margin:0 auto}.hero-badge{display:inline-block;background-color:var(--color-primary);color:#fff;padding:4px 12px;border-radius:16px;font-size:.75rem;font-weight:500;margin-bottom:24px}.hero h1{font-size:3rem;font-weight:700;margin-bottom:16px;letter-spacing:-.02em}.hero-tagline{font-size:1.5rem;color:var(--color-text-secondary);margin-bottom:32px}.hero-description{font-size:1.125rem;color:var(--color-text-secondary);margin-bottom:40px;max-width:600px;margin-left:auto;margin-right:auto}.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:12px;font-size:1rem;font-weight:500;text-decoration:none;transition:all .2s}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-secondary{background-color:var(--color-bg-secondary);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover{background-color:var(--color-border)}.features{padding:80px 24px}.features-content{max-width:var(--max-width);margin:0 auto}.section-title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:48px}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px}.feature-card{padding:32px;background-color:var(--color-bg-secondary);border-radius:16px;border:1px solid var(--color-border)}.feature-icon{font-size:2.5rem;margin-bottom:16px}.feature-card h3{font-size:1.25rem;margin-bottom:8px}.feature-card p{color:var(--color-text-secondary);font-size:.9375rem}.how-it-works{padding:80px 24px;background-color:var(--color-bg-secondary)}.how-it-works-content{max-width:var(--max-width);margin:0 auto}.steps{display:flex;flex-direction:column;gap:32px;max-width:600px;margin:0 auto}.step{display:flex;gap:24px;align-items:flex-start}.step-number{flex-shrink:0;width:40px;height:40px;background-color:var(--color-primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600}.step-content h3{font-size:1.125rem;margin-bottom:4px}.step-content p{color:var(--color-text-secondary)}.alert-demo{padding:80px 24px}.alert-demo-content{max-width:var(--max-width);margin:0 auto}.alert-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;max-width:700px;margin:0 auto}.alert-card{padding:32px;border-radius:16px;text-align:center}.alert-card.touch{background-color:#fff9e6;border:2px solid var(--color-warning)}.alert-card.grab{background-color:#ffebeb;border:2px solid var(--color-danger)}@media(prefers-color-scheme:dark){.alert-card.touch{background-color:#3d3500}.alert-card.grab{background-color:#3d0000}}.alert-card h3{font-size:1.25rem;margin-bottom:8px}.alert-card p{color:var(--color-text-secondary);font-size:.9375rem}.legal-page{padding:80px 24px}.legal-content{max-width:800px;margin:0 auto}.legal-content h1{font-size:2.5rem;margin-bottom:8px}.legal-content .last-updated{color:var(--color-text-secondary);margin-bottom:48px}.legal-content h2{font-size:1.5rem;margin-top:48px;margin-bottom:16px}.legal-content p{margin-bottom:16px;color:var(--color-text-secondary)}.legal-content ul{margin-bottom:16px;padding-left:24px}.legal-content li{margin-bottom:8px;color:var(--color-text-secondary)}.language-switcher{display:flex;gap:4px;margin-left:8px}.language-switcher button{background:transparent;border:1px solid var(--color-border);border-radius:4px;padding:4px 8px;font-size:.75rem;color:var(--color-text-secondary);cursor:pointer;transition:all .2s}.language-switcher button:hover{border-color:var(--color-primary);color:var(--color-primary)}.language-switcher button.active{background-color:var(--color-primary);border-color:var(--color-primary);color:#fff}@media(max-width:768px){.hero h1{font-size:2rem}.hero-tagline{font-size:1.25rem}.header-nav{gap:12px;font-size:.8rem}.header-nav a{font-size:.75rem}.features-grid{grid-template-columns:1fr}}