.image-converter-container{max-width:900px;margin:40px auto;padding:40px;background-color:#fff;text-align:center;border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.05);font-family:"Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN","Hiragino Sans",Meiryo,sans-serif;color:#333}.icm-heading{font-size:1.8rem;font-weight:700;margin-bottom:12px;color:#2c3e50;letter-spacing:-.02em}.icm-subtext{font-size:1rem;color:#888;margin-bottom:30px}.icm-format-row{margin-bottom:30px;display:flex;justify-content:center;align-items:center;gap:12px}.icm-format-label{font-weight:600;font-size:.95rem;color:#444;width:120px}.icm-format-select{padding:8px 16px;font-size:.95rem;border-radius:8px;border:1px solid #e0e0e0;background-color:#f9f9f9;cursor:pointer;transition:border-color .2s}.icm-format-select:focus{border-color:#46757e;outline:none}.icm-drag-drop-area{background-color:#fcfcfc;border:2px dashed #d0d7de;border-radius:12px;padding:60px 40px;margin-bottom:30px;transition:all .3s ease;display:flex;flex-direction:column;align-items:center;justify-content:center}.icm-drag-drop-area p{margin:0 0 15px 0;font-size:1.1rem;color:#555}.icm-drag-drop-area small{display:block;margin-top:8px;color:#aaa}.icm-drag-drop-area.dragover{background-color:#f0f7f8;border-color:#46757e;transform:scale(1.01)}.icm-file-select-btn{background-color:#46757e;color:#fff;border:none;padding:12px 24px;font-size:1rem;font-weight:600;cursor:pointer;border-radius:8px;transition:background-color .2s , transform .1s}.icm-file-select-btn:hover{background-color:#385d65}.icm-file-select-btn:active{transform:scale(.98)}.icm-preview-list{display:flex;flex-wrap:nowrap;gap:20px;overflow-x:auto;padding:10px 5px 25px;margin-bottom:30px;scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.icm-preview-list::-webkit-scrollbar{height:6px}.icm-preview-list::-webkit-scrollbar-track{background:#f1f1f1;border-radius:10px}.icm-preview-list::-webkit-scrollbar-thumb{background:#ccc;border-radius:10px}.icm-preview-list::-webkit-scrollbar-thumb:hover{background:#46757e}.icm-preview-card{flex:0 0 180px;background-color:#fff;border:1px solid #f0f0f0;border-radius:12px;text-align:center;padding:15px;transition:transform .2s , box-shadow .2s;box-shadow:0 4px 12px rgba(0,0,0,.03)}.icm-preview-card:hover{transform:translateY(-5px);box-shadow:0 8px 20px rgba(0,0,0,.08)}.icm-preview-image{width:100%;height:120px;object-fit:cover;border-radius:8px;margin-bottom:12px;background-color:#eee}.icm-preview-filename{font-size:.8rem;color:#333;margin-bottom:10px;word-break:break-all;font-weight:500;height:2.4em;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.icm-stats{display:flex;flex-direction:column;gap:6px;margin-bottom:15px}.icm-size-info{font-size:.75rem;color:#777}.icm-size-info strong{color:#333}.icm-badge{display:inline-block;padding:3px 8px;border-radius:20px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:#fff}.reduction-positive{background-color:#27ae60}.reduction-neutral{background-color:#95a5a6}.icm-download-btn{display:block;background-color:#46757e;color:#fff;text-decoration:none;padding:8px 0;border-radius:6px;font-size:.85rem;font-weight:600;transition:opacity .2s , color .2s}.icm-download-btn:hover{opacity:.9;color:#fff}.icm-zip-row{margin-top:10px}.icm-download-all-btn{background-color:#46757e;color:#fff;border:none;padding:14px 32px;font-size:1rem;font-weight:700;cursor:pointer;border-radius:10px;transition:all .3s ease;box-shadow:0 4px 15px rgba(70,117,126,.2)}.icm-download-all-btn:hover{background-color:#385d65;color:#fff;box-shadow:0 6px 20px rgba(70,117,126,.3);transform:translateY(-2px)}.icm-message{display:none;margin-top:25px;font-weight:500}.icm-usage-guide{margin-top:40px;padding:25px;background-color:#f8fafa;border-left:4px solid #46757e;border-radius:8px;text-align:left}.icm-guide-title{font-size:1.1rem;font-weight:700;color:#385d65;margin-bottom:15px;display:flex;align-items:center;gap:8px}.icm-guide-list{list-style:disc;padding-left:20px;margin:0}.icm-guide-list li{font-size:.95rem;line-height:1.8;color:#444;margin-bottom:8px}.icm-text-highlight{color:#b35a38;font-weight:600;text-decoration:underline;transition:opacity .2s}.icm-text-highlight:hover{opacity:.7;text-decoration:none}@media (max-width:600px){.image-converter-container{padding:20px;margin:10px}.icm-drag-drop-area{padding:40px 20px}.icm-usage-guide{padding:20px 15px}.icm-guide-list li{font-size:.85rem}}