:root{--primary-color: #0066cc;--primary-dark: #004a99;--success-color: #28a745;--warning-color: #ffc107;--error-color: #dc3545;--text-color: #333;--border-color: #ddd;--bg-light: #f8f9fa;--shadow: 0 2px 8px rgba(0,0,0,.1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Arial,sans-serif;color:var(--text-color);background:linear-gradient(135deg,#f5f7fa,#c3cfe2);min-height:100vh}.intro-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.intro-container{background:#fff;border-radius:12px;padding:40px;max-width:800px;box-shadow:0 4px 20px #00000026;text-align:center}.intro-container h1{font-size:32px;color:var(--primary-color);margin-bottom:10px}.intro-subtitle{font-size:18px;color:#666;margin-bottom:40px;font-weight:500}.intro-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:40px}.intro-feature{text-align:center}.feature-icon{font-size:48px;margin-bottom:15px}.intro-feature h3{font-size:18px;color:var(--primary-color);margin-bottom:10px}.intro-feature p{font-size:14px;color:#666;line-height:1.6}.intro-expectation{background:var(--bg-light);border-radius:8px;padding:25px;margin-bottom:30px;text-align:left}.intro-expectation h3{font-size:18px;margin-bottom:15px;color:var(--primary-dark)}.intro-expectation ul{list-style:none;padding:0}.intro-expectation li{padding:8px 0;font-size:15px;color:#333}.btn-start{background:linear-gradient(135deg,var(--success-color) 0%,#20c997 100%);color:#fff;border:none;padding:15px 40px;font-size:18px;border-radius:8px;cursor:pointer;transition:all .3s ease;font-weight:700;box-shadow:0 4px 15px #28a7454d}.btn-start:hover{transform:translateY(-2px);box-shadow:0 6px 20px #28a74566}.intro-footer{margin-top:30px;font-size:13px;color:#888;font-style:italic}.app-container{max-width:800px;margin:40px auto;padding:20px}.app-header{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-dark) 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h3{font-size:18px;color:var(--primary-dark);margin-bottom:20px}.summary-item{margin-bottom:20px;padding-bottom:20px;border-bottom:1px solid #ddd}.summary-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.summary-item strong{display:block;color:var(--primary-dark);margin-bottom:8px;font-size:15px}.summary-item p,.summary-item ul{font-size:14px;color:#555;line-height:1.6}.summary-item ul{list-style:none;padding-left:0}.summary-item li{padding:4px 0}.next-steps-box{background:linear-gradient(135deg,#e8f5e9,#c8e6c9);border-radius:8px;padding:25px;margin:25px 0;border:2px solid #81c784}.next-steps-box h3{font-size:18px;color:#2e7d32;margin-bottom:15px}.next-steps-box ol{counter-reset:step-counter;list-style:none;padding:0}.next-steps-box li{counter-increment:step-counter;position:relative;padding-left:40px;margin-bottom:15px}.next-steps-box 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