:root{--primary-color:#007bff;--secondary-color:#6c757d;--accent-color:#28a745;--background-color:#f8f9fa;--card-background:#ffffff;--text-color:#343a40;--border-color:#dee2e6;--shadow-light:0 4px 8px rgba(0, 0, 0, 0.05);--shadow-medium:0 8px 16px rgba(0, 0, 0, 0.1);--tab-inactive-bg:#e9ecef;--tab-active-bg:var(--primary-color);--tab-active-text:white}body{font-family:'Noto Sans JP',sans-serif;margin:0;padding:0 20px;background-color:var(--background-color);color:var(--text-color);line-height:1.6;display:flex;flex-direction:column;justify-content:space-between;align-items:center;min-height:100vh;box-sizing:border-box}.container{background-color:var(--card-background);border-radius:12px;box-shadow:var(--shadow-medium);padding:40px;width:100%;max-width:1200px;box-sizing:border-box;text-align:center;margin-top:30px;margin-bottom:30px;flex-shrink:0;flex-grow:1;margin-left:auto;margin-right:auto}h1{color:var(--primary-color);margin-bottom:10px;font-size:2.2em;font-weight:700}h2{color:var(--text-color);margin-top:30px;margin-bottom:20px;font-size:1.6em;border-bottom:1px solid var(--border-color);padding-bottom:10px;display:inline-block}.description{color:var(--secondary-color);margin-bottom:30px;font-size:1.1em;text-align:left}.upload-area{border:3px dashed var(--border-color);border-radius:8px;padding:50px 20px;text-align:center;cursor:pointer;transition:all .3s ease;background-color:rgba(0,123,255,.05)}.upload-area.drag-over,.upload-area:hover{border-color:var(--primary-color);background-color:rgba(0,123,255,.1)}.upload-button{display:inline-block;background-color:var(--primary-color);color:#fff;padding:15px 30px;border-radius:8px;cursor:pointer;font-size:1.2em;font-weight:700;transition:background-color .3s ease}.upload-button:hover{background-color:#0056b3}.drag-text{margin-top:20px;color:var(--secondary-color);font-size:.9em}.main-content{display:flex;gap:30px;margin-top:30px;flex-wrap:wrap}.controls-container,.image-preview-container{background-color:var(--card-background);border-radius:8px;padding:30px;box-shadow:var(--shadow-light);border:1px solid var(--border-color);flex:1}@media (min-width:900px){.image-preview-container{flex:2;max-width:60%}.controls-container{flex:1;max-width:40%}}.image-wrapper{position:relative;max-width:100%;margin:0 auto 20px;display:flex;justify-content:center;align-items:center;min-height:400px;max-height:600px;overflow:hidden;background-color:#e0e0e0}.image-wrapper .cropper-container{max-width:100%;max-height:100%}#previewImage{max-width:100%;height:auto;display:block}.tabs{display:flex;justify-content:center;margin-bottom:20px;border-bottom:1px solid var(--border-color)}.tab-button{background-color:var(--tab-inactive-bg);color:var(--text-color);border:none;padding:12px 25px;cursor:pointer;font-size:1.1em;font-weight:700;transition:all .3s ease;border-top-left-radius:8px;border-top-right-radius:8px;margin:0 2px}.tab-button:hover{background-color:var(--border-color)}.tab-button.active{background-color:var(--tab-active-bg);color:var(--tab-active-text);box-shadow:var(--shadow-light);transform:translateY(-2px);border-bottom:none}.tab-content{padding-top:20px}.control-group{margin-bottom:20px;text-align:left;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:15px}.control-group label{font-weight:700;color:var(--text-color);min-width:100px}.control-group input[type=number],.control-group select{flex-grow:1;max-width:200px;padding:12px 15px;border:1px solid var(--border-color);border-radius:8px;font-size:1em;color:var(--text-color);transition:border-color .3s ease,box-shadow .3s ease}.control-group input[type=number]:focus,.control-group select:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(0,123,255,.25);outline:0}.size-info{font-size:1.1em;font-weight:700;color:var(--primary-color);flex-grow:1;text-align:center;white-space:nowrap;min-width:150px}.btn{display:inline-block;padding:15px 20px;border-radius:8px;cursor:pointer;font-size:1.1em;font-weight:700;transition:background-color .3s ease,transform .2s ease;border:none;text-decoration:none;margin:10px;white-space:nowrap}.btn-primary{background-color:var(--accent-color);color:#fff}.btn-primary:hover{background-color:#218838;transform:translateY(-2px)}.btn-secondary{background-color:var(--secondary-color);color:#fff}.btn-secondary:hover{background-color:#5a6268;transform:translateY(-2px)}.message-area{margin-top:20px;padding:15px;border-radius:8px;background-color:#e2f0ff;color:#004085;border:1px solid #b8daff;display:none}.message-area.error{background-color:#f8d7da;color:#721c24;border-color:#f5c6cb}.hidden{display:none!important}.cropper-face,.cropper-view-box{outline:2px solid var(--primary-color)!important}.cropper-point{background-color:var(--primary-color)!important;border-color:#fff!important;opacity:1!important}.crop-checkbox-row{display:flex;align-items:center;flex-wrap:nowrap;width:100%;justify-content:center}.crop-checkbox-row label{white-space:nowrap;flex-shrink:0}.crop-checkbox-row input[type=checkbox]{flex-shrink:0;width:auto;margin-right:10px}.help-link-container{margin-top:40px;padding-top:20px;border-top:1px solid var(--border-color);margin-left:auto;margin-right:auto;max-width:1200px;box-sizing:border-box;padding-left:40px;padding-right:40px}.help-link{color:var(--primary-color);text-decoration:none;font-weight:700;font-size:1.1em;transition:color .3s ease}.help-link:hover{color:#0056b3;text-decoration:underline}.footer{width:100%;padding:20px 0;margin-top:auto;border-top:1px solid var(--border-color);display:block;clear:both;text-align:center}.copyright{color:var(--secondary-color);font-size:.9em;white-space:nowrap;display:inline-block;max-width:1200px;padding:0 40px;box-sizing:border-box;min-width:280px}@media (max-width:899px){.container{padding:20px;margin-top:20px;margin-bottom:20px}h1{font-size:1.8em}.upload-button{font-size:1em;padding:12px 20px}.tab-button{padding:10px 15px;font-size:1em}.main-content{flex-direction:column;gap:20px}.controls-container,.image-preview-container{flex:auto;max-width:100%}.image-preview-container{padding-left:15px;padding-right:15px}.controls-container{padding-left:15px;padding-right:15px}.control-group{flex-direction:column;align-items:flex-start;gap:10px}.control-group label{min-width:unset;width:100%}.control-group input[type=number],.control-group select{width:100%;max-width:unset;box-sizing:border-box}.btn{width:calc(100% - 20px);margin:10px 0}.crop-checkbox-row{display:flex;flex-direction:row;flex-wrap:nowrap;width:100%;justify-content:flex-start;margin-top:0;margin-bottom:0;padding:0}.crop-checkbox-row label{font-size:.9em}.size-info{text-align:left;width:100%;white-space:normal;font-size:1em}.copyright{padding:0 20px;font-size:.8em;min-width:unset;white-space:normal;display:block;text-align:center}.help-link-container{padding-left:20px;padding-right:20px}}.help-section{text-align:left;margin-bottom:30px;padding-bottom:20px;border-bottom:1px dashed var(--border-color)}.help-section h2{text-align:left;border-bottom:none;font-size:1.4em;margin-top:0;margin-bottom:15px;display:block}.help-section p,.help-section ul{text-align:left;margin-bottom:10px}.help-section ul{list-style-type:disc;margin-left:20px;padding-left:0}.help-section li{margin-bottom:5px}.back-link-container{margin-top:40px;padding-top:20px;border-top:1px solid var(--border-color);text-align:center}.button-group{display:flex;flex-direction:column;gap:10px;width:100%;align-items:center}.button-group .btn{width:100%;max-width:300px;margin:0;box-sizing:border-box}@media (max-width:899px){.button-group .btn{max-width:unset;width:100%}}