:root{--primary-color: #007aff;--bg-color: #ffffff;--text-color: #333333;--header-bg: #f8f8f8;--border-color: #ddd;--chat-bg: transparent;--list-item-bg: #ffffff;--bubble-me: #dcf8c6;--bubble-gemini: #f0f0f0}body.dark-mode{--bg-color: #1c1c1e;--text-color: #ffffff;--header-bg: #2c2c2e;--border-color: #3a3a3c;--list-item-bg: #2c2c2e;--bubble-me: #30d158;--bubble-gemini: #3a3a3c}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body,html{margin:0;padding:0;width:100%;height:100%;font-family:-apple-system,BlinkMacSystemFont,Helvetica Neue,Segoe UI,Hiragino Kaku Gothic ProN,ヒラギノ角ゴ ProN W3,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);overflow:hidden;background-size:cover;background-position:center;background-repeat:no-repeat;transition:background-color .3s,color .3s}#app{display:flex;flex-direction:column;height:100%}section{display:flex;flex-direction:column;height:100%;width:100%}.hidden{display:none!important}header{display:flex;justify-content:space-between;align-items:center;padding:10px 15px;background-color:var(--header-bg);border-bottom:1px solid var(--border-color);flex-shrink:0;height:50px}header h1{margin:0;font-size:1.1rem;font-weight:600}header button{background:none;border:none;font-size:1.2rem;color:var(--primary-color);cursor:pointer;padding:5px}.header-actions{display:flex;align-items:center}.switch-label{font-size:.8rem;font-weight:700;color:var(--primary-color);display:flex;align-items:center;gap:5px}.feedback-area{margin-top:10px;padding-top:8px;border-top:1px dashed #ccc;font-size:.9rem}.feedback-area .sliders{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:10px;justify-content:space-between}.feedback-area label{display:flex;align-items:center;gap:5px;font-size:.8rem}.feedback-area input[type=range]{width:80px;height:30px}.feedback-area button{background-color:var(--primary-color);color:#fff;border:none;padding:10px 20px;border-radius:8px;font-size:.9rem;width:100%;margin-top:5px;min-height:44px}.switch-label{font-size:1rem;font-weight:700;color:var(--primary-color);display:flex;align-items:center;gap:10px;padding:5px}.switch-label input[type=checkbox]{transform:scale(1.5)}#chat-list{list-style:none;padding:0;margin:0;overflow-y:auto;flex-grow:1}.chat-item{display:flex;align-items:center;padding:15px;background-color:var(--list-item-bg);border-bottom:1px solid var(--border-color);cursor:pointer}.chat-info{flex-grow:1;display:flex;flex-direction:column;overflow:hidden}.chat-item-title{font-size:1rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-item-date{font-size:.8rem;color:#8e8e93;margin-top:4px}.chat-item button{background:none;border:none;font-size:1.2rem;margin-left:10px;cursor:pointer;padding:5px}.fab-container{position:absolute;bottom:20px;right:20px}#create-chat-btn{width:56px;height:56px;border-radius:50%;background-color:var(--primary-color);color:#fff;border:none;font-size:2rem;box-shadow:0 4px 6px rgba(0,0,0,.3);cursor:pointer;display:flex;justify-content:center;align-items:center}main{flex-grow:1;overflow-y:auto;padding:10px;-webkit-overflow-scrolling:touch}#chat-log{list-style:none;padding:0;margin:0}.message{margin-bottom:10px;max-width:85%;padding:8px 12px;border-radius:18px;font-size:1rem;line-height:1.4;word-wrap:break-word;position:relative;box-shadow:0 1px 2px rgba(0,0,0,.1);color:#000}body.dark-mode .message{color:#fff}.message.me{background-color:var(--bubble-me);align-self:flex-end;margin-left:auto;border-bottom-right-radius:4px;color:#000}.message.gemini{background-color:var(--bubble-gemini);align-self:flex-start;margin-right:auto;border-bottom-left-radius:4px;color:#000}body.dark-mode .message.me,body.dark-mode .message.gemini{color:#fff}footer{padding:10px;background-color:var(--header-bg);border-top:1px solid var(--border-color);flex-shrink:0}.input-area{display:flex;gap:10px;align-items:flex-end}#user-input{flex-grow:1;border:1px solid #ccc;border-radius:20px;padding:10px 15px;font-size:1rem;resize:none;max-height:100px;outline:none;background-color:var(--list-item-bg);color:var(--text-color)}#send-btn{background-color:var(--primary-color);color:#fff;border:none;border-radius:20px;padding:10px 20px;font-size:1rem;font-weight:700;cursor:pointer;flex-shrink:0}#send-btn:disabled{background-color:#ccc}#settings-modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background:var(--bg-color);color:var(--text-color);padding:20px;border-radius:12px;width:90%;max-width:400px;max-height:85vh;overflow-y:auto;box-shadow:0 5px 15px rgba(0,0,0,.3)}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:600;font-size:.9rem}.form-group input[type=text],.form-group input[type=password],.form-group select,.form-group textarea{width:100%;padding:10px;font-size:1rem;border:1px solid #ccc;border-radius:8px;background-color:var(--list-item-bg);color:var(--text-color)}.row{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.primary-btn{background-color:var(--primary-color);color:#fff;border:none;padding:10px 20px;border-radius:8px;font-size:1rem}.secondary-btn{background-color:#e5e5ea;color:#333;border:none;padding:10px 20px;border-radius:8px;font-size:1rem}body.dark-mode .secondary-btn{background-color:#3a3a3c;color:#fff}#bg-preview{width:100%;height:120px;object-fit:cover;margin-top:10px;border-radius:8px;border:1px solid #ccc;display:none}