*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:#333;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background:#667eeaf2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);padding:1rem 2rem;border-bottom:1px solid rgba(255,255,255,.2);box-shadow:0 2px 20px #667eea4d}.logo{color:#fff;font-size:1.5rem;font-weight:700;cursor:pointer;transition:opacity .2s}.logo:hover{opacity:.8}.app-main{flex:1;padding:2rem;display:flex;justify-content:center;align-items:center}.app-footer{background:#0003;color:#fffc;text-align:center;padding:1rem;font-size:.9rem}.create-profile,.qr-display,.profile-view{background:#fff;border-radius:20px;padding:2rem;box-shadow:0 20px 40px #0000001a;max-width:500px;width:100%;margin:0 auto}h1{color:#333;margin-bottom:.5rem;font-size:2rem;text-align:center}.subtitle{text-align:center;color:#666;margin-bottom:2rem;font-size:1.1rem}.error{background:#fee;color:#c33;padding:1rem;border-radius:8px;margin-bottom:1rem;border:1px solid #fcc}.loading{text-align:center;color:#666;font-size:1.1rem;padding:2rem}.profile-form{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}label{font-weight:600;color:#555;font-size:.9rem;display:flex;justify-content:space-between;align-items:center}.char-limit{font-size:.8rem;color:#999;font-weight:400}.char-limit.warning{color:#ff9800}.char-limit.danger{color:#f44336}input,textarea,select{padding:.75rem;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;transition:border-color .2s}input:focus,textarea:focus,select:focus{outline:none;border-color:#667eea}input:disabled,textarea:disabled,select:disabled{background:#f5f5f5;cursor:not-allowed}textarea{resize:vertical;min-height:80px}.btn-primary,.btn-secondary,.btn-tertiary{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;text-decoration:none;display:inline-block;text-align:center}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.btn-secondary{background:#f8f9fa;color:#495057;border:2px solid #e9ecef}.btn-secondary:hover{background:#e9ecef}.btn-tertiary{background:transparent;color:#667eea;border:2px solid #667eea}.btn-tertiary:hover{background:#667eea;color:#fff}.btn-primary:disabled{background:#ccc;cursor:not-allowed;transform:none}.qr-container{text-align:center;margin:2rem 0}.qr-code{max-width:300px;width:100%;height:auto;border-radius:12px;box-shadow:0 4px 12px #0000001a;margin-bottom:1rem}.countdown{background:#f8f9fa;padding:1rem;border-radius:8px;margin-top:1rem}.time-label{display:block;font-size:.9rem;color:#666;margin-bottom:.5rem}.time-value{font-size:1.5rem;font-weight:700;color:#333}.time-value.urgent{color:#dc3545;animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.actions{display:flex;flex-direction:column;gap:1rem;margin:2rem 0}.instructions{background:#f8f9fa;padding:1.5rem;border-radius:8px;margin-top:2rem}.instructions h3{color:#333;margin-bottom:1rem;font-size:1.1rem}.instructions ul{list-style:none;padding:0}.instructions li{padding:.5rem 0 .5rem 1.5rem;position:relative}.instructions li:before{content:"✓";position:absolute;left:0;color:#28a745;font-weight:700}.profile-header{text-align:center;margin-bottom:2rem}.expires-info{background:#fff3cd;padding:1rem;border-radius:8px;margin-top:1rem;border:1px solid #ffeaa7}.expires-label{display:block;font-size:.9rem;color:#856404;margin-bottom:.25rem}.expires-time{font-weight:700;color:#856404;font-size:1.1rem}.expires-time.urgent{color:#721c24;background:#f8d7da;padding:.25rem .5rem;border-radius:4px}.profile-content,.message-section,.contact-section{margin-bottom:2rem}.message-section h2{color:#333;margin-bottom:1rem;font-size:1.3rem}.contact-section h3{color:#555;margin-bottom:.5rem;font-size:1.1rem}.message{background:#f8f9fa;padding:1.5rem;border-radius:8px;font-size:1.1rem;line-height:1.6;color:#333;border-left:4px solid #667eea}.contact-info{font-size:1rem;color:#555}.contact-info a{color:#667eea;text-decoration:none;font-weight:600}.contact-info a:hover{text-decoration:underline}.profile-footer{text-align:center;padding-top:2rem;border-top:1px solid #e9ecef;color:#666;font-size:.9rem}.profile-footer a{color:#667eea;text-decoration:none;font-weight:600}.error-container{text-align:center;padding:2rem}.error-container h1{font-size:3rem;margin-bottom:1rem}.action-section{text-align:center;margin-top:2rem}.landing-page{width:100%;min-height:100vh}.landing-page .app-header,.app-header{display:flex;justify-content:space-between;align-items:center;position:fixed;top:0;left:0;right:0;z-index:1000;background:linear-gradient(135deg,#667eeaf2,#764ba2f2);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,.2);box-shadow:0 2px 20px #667eea4d}.header-nav{display:flex;gap:1rem}.nav-link{color:#fff;text-decoration:none;font-weight:600;padding:.5rem 1rem;border-radius:6px;transition:all .2s;border:1px solid transparent}.nav-link:hover{background:#fff3;border-color:#ffffff4d;color:#fff}.hero-section{background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;position:relative;overflow:hidden;padding-top:80px}.hero-section:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="90" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');opacity:.3}.hero-content{position:relative;z-index:2;max-width:800px;padding:2rem}.hero-title{font-size:4rem;font-weight:900;margin-bottom:1rem;text-shadow:0 4px 8px rgba(0,0,0,.2);line-height:1.1}.tagline{display:block;font-size:1.5rem;font-weight:400;opacity:.9;margin-top:.5rem}.hero-subtitle{font-size:1.3rem;margin-bottom:2.5rem;opacity:.9;line-height:1.6;max-width:600px;margin-left:auto;margin-right:auto}.hero-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.btn-large{padding:1rem 2rem;font-size:1.1rem;border-radius:12px;box-shadow:0 4px 15px #0003}.btn-primary.btn-large{background:#fff;color:#667eea;font-weight:700}.btn-primary.btn-large:hover{transform:translateY(-3px);box-shadow:0 8px 25px #0000004d}.btn-secondary.btn-large{background:transparent;color:#fff;border:2px solid white}.btn-secondary.btn-large:hover{background:#fff;color:#667eea}section{padding:5rem 0}.container{max-width:1200px;margin:0 auto;padding:0 2rem}.section-title{font-size:2.5rem;text-align:center;margin-bottom:1rem;color:#333;font-weight:800}.section-subtitle{font-size:1.2rem;text-align:center;color:#666;margin-bottom:3rem;max-width:600px;margin-left:auto;margin-right:auto}.how-it-works{background:#f8f9fa}.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-top:3rem}.step-card{background:#fff;padding:2rem;border-radius:20px;text-align:center;box-shadow:0 10px 30px #0000001a;transition:transform .3s,box-shadow .3s;position:relative}.step-card:hover{transform:translateY(-5px);box-shadow:0 20px 40px #00000026}.step-number{position:absolute;top:-15px;left:2rem;background:#667eea;color:#fff;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem}.step-icon{font-size:3rem;margin-bottom:1rem;display:block}.step-card h3{color:#333;margin-bottom:1rem;font-size:1.3rem;font-weight:700}.step-card p{color:#666;line-height:1.6}.features{background:#fff}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-top:3rem}.feature-card{padding:2rem;border-radius:16px;border:2px solid #f0f0f0;transition:all .3s;text-align:center}.feature-card:hover{border-color:#667eea;transform:translateY(-3px);box-shadow:0 10px 30px #667eea1a}.feature-icon{font-size:2.5rem;margin-bottom:1rem;display:block}.feature-card h3{color:#333;margin-bottom:1rem;font-size:1.2rem;font-weight:700}.feature-card p{color:#666;line-height:1.6}.use-cases{background:linear-gradient(135deg,#f8f9fa,#e9ecef)}.use-cases-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem;margin-top:3rem}.use-case{background:#fff;padding:2rem;border-radius:16px;text-align:center;box-shadow:0 5px 20px #00000014;transition:transform .3s}.use-case:hover{transform:translateY(-3px)}.use-case-emoji{font-size:3rem;margin-bottom:1rem;display:block}.use-case h3{color:#333;margin-bottom:1rem;font-size:1.3rem;font-weight:700}.use-case p{color:#666;line-height:1.6}.cta-section{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;text-align:center}.cta-content h2{font-size:2.5rem;margin-bottom:1rem;font-weight:800}.cta-content p{font-size:1.2rem;margin-bottom:2rem;opacity:.9;max-width:600px;margin-left:auto;margin-right:auto}.landing-footer{background:#333;color:#fff;padding:2rem 0;text-align:center}.footer-links{margin-top:1rem;display:flex;justify-content:center;align-items:center;gap:1rem;flex-wrap:wrap}.footer-links a{color:#667eea;text-decoration:none;font-weight:600}.footer-links a:hover{text-decoration:underline}.footer-links span{color:#666}@media (max-width: 768px){.app-main{padding:1rem}.create-profile,.qr-display,.profile-view{padding:1.5rem;margin:0}h1{font-size:1.5rem}.actions{gap:.75rem}.btn-primary,.btn-secondary,.btn-tertiary{padding:.75rem 1rem;font-size:.9rem}.hero-title{font-size:2.5rem}.tagline{font-size:1.2rem}.hero-subtitle{font-size:1.1rem}.hero-actions{flex-direction:column;align-items:center}.section-title{font-size:2rem}.steps-grid,.features-grid,.use-cases-grid{grid-template-columns:1fr;gap:1.5rem}.container{padding:0 1rem}section{padding:3rem 0}.step-card,.feature-card,.use-case{padding:1.5rem}}@media (max-width: 480px){.hero-title{font-size:2rem}.hero-content{padding:1rem}.btn-large{padding:.75rem 1.5rem;font-size:1rem}}
