*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;background:linear-gradient(to bottom,#f8fafc,#e2e8f0);min-height:100vh;padding:20px 20px}.container{max-width:800px;margin:0 auto}h1{text-align:center;color:#1e293b;margin-bottom:10px;font-size:22px}.block{background:#fff;border-radius:8px;padding:12px;margin-bottom:12px;box-shadow:0 1px 3px rgb(0 0 0 / .1);transition:padding 0.3s}.block.collapsed{padding:12px 24px}.block h2{color:#334155;margin-bottom:20px;font-size:20px;cursor:pointer;user-select:none;display:flex;justify-content:space-between;align-items:center;padding:8px;border-radius:6px;transition:background-color 0.2s,font-size 0.3s,padding 0.3s}.block h2.collapsed{font-size:16px;padding:6px 8px}.block h2:hover{background-color:#f1f5f9}.block h2::after{content:'▼';font-size:14px;transition:transform 0.3s}.block h2.collapsed::after{transform:rotate(-90deg)}.block-content{max-height:1000px;overflow:hidden;transition:max-height 0.3s ease-out,opacity 0.3s ease-out;opacity:1}.block-content.collapsed{max-height:0;opacity:0}.input-group{margin-bottom:16px}label{display:block;margin-bottom:8px;color:#475569;font-size:14px;font-weight:500}input[type="number"]{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:6px;font-size:16px;transition:border-color 0.2s}input[type="number"]:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px rgb(59 130 246 / .1)}.result{margin-top:20px;padding:16px;background:#f0fdf4;border:1px solid #86efac;border-radius:6px;display:none}.result.show{display:block}.result strong{color:#15803d;font-size:18px}.result-text{color:#166534;margin-top:4px}.bottom-ad-small,.bottom-ad-large{margin:0 auto;text-align:center;align-items:center;display:none}.play-store-image-container{margin:0 auto;text-align:center;align-items:center}@media (max-width:767px){.bottom-ad-small{display:block}.play-store-image{width:50%;height:50%}}@media (min-width:768px){.bottom-ad-large{display:block}.play-store-image{width:25%;height:25%}}.seo-container{margin-top:10px;padding:15px;background:#fff;border-radius:8px;box-shadow:0 1px 3px rgb(0 0 0 / .1);margin-bottom:10px}.seo-container h2{color:#334155;font-size:20px;margin-bottom:15px}.seo-container .b1{color:#333;line-height:1.6;margin-bottom:15px}.seo-container .b2{color:#334155;font-size:18px;margin-bottom:10px;margin-top:20px}.seo-container .b3{color:#333;line-height:1.6;margin-bottom:15px}.seo-container .b4{color:#333;line-height:1.8;margin-left:20px;margin-bottom:15px}.seo-container .b5{color:#334155;font-size:18px;margin-bottom:10px;margin-top:20px}.seo-container .b6{color:#333;line-height:1.8;margin-left:20px}.seo-container .b7{color:#555;font-size:14px;margin-top:30px;text-align:center}