:root{--bg-color:#f0f0f0;--text-color:#333;--card-bg-color:#fff;--card-border-color:#eee;--button-bg:#ff4d6d;--button-hover:#ff758f;--modal-overlay:#000000b3;--accent-color:#ff4d6d;--chat-bg:#f9f9f9;--my-bubble:#ff4d6d;--other-bubble:#fff}body.dark-mode{--bg-color:#1a1a1a;--text-color:#f0f0f0;--card-bg-color:#2d2d2d;--card-border-color:#444;--chat-bg:#222;--my-bubble:#ff4d6d;--other-bubble:#333}html,body{overscroll-behavior-y:none;width:100%;min-height:100vh;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);flex-direction:column;align-items:center;padding-bottom:70px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;transition:background-color .3s,color .3s;display:flex}h1{margin-top:20px;margin-bottom:20px;font-size:24px}#content-container{flex-direction:column;align-items:center;width:100%;display:flex}.tab-content{box-sizing:border-box;flex-direction:column;align-items:center;width:100%;padding:0 15px;display:none}.tab-content.active{display:flex}.chat-list{flex-direction:column;gap:10px;width:100%;max-width:500px;display:flex}#chat-list-view{flex-direction:column;align-items:center;width:100%;margin-top:60px;display:flex}.chat-item{background-color:var(--card-bg-color);cursor:pointer;border:1px solid var(--card-border-color);box-sizing:border-box;border-radius:15px;align-items:center;gap:15px;width:100%;padding:15px;transition:transform .1s;display:flex}.chat-item:active{transform:scale(.98)}.chat-item img{background-color:var(--bg-color);border-radius:50%;width:50px;height:50px}.chat-info{flex:1}.chat-info h3{align-items:center;gap:5px;margin:0;font-size:16px;display:flex}.pinned-badge{font-size:12px}.chat-info p{opacity:.7;white-space:nowrap;text-overflow:ellipsis;margin:5px 0 0;font-size:14px;overflow:hidden}.empty-chat{text-align:center;opacity:.5;padding:50px 0}#chat-room-view{background-color:var(--bg-color);z-index:2000;box-sizing:border-box;flex-direction:column;width:100%;max-width:500px;height:100dvh;margin:0 auto;display:flex;position:fixed;inset:0;overflow:hidden}.chat-room-header{border-bottom:1px solid var(--card-border-color);background-color:var(--bg-color);z-index:2010;flex-shrink:0;align-items:center;width:100%;margin-top:40px;padding:10px 0;display:flex}.back-btn{cursor:pointer;color:var(--text-color);background:0 0;border:none;padding:0 15px;font-size:24px}.chat-room-header h2{text-align:center;white-space:nowrap;text-overflow:ellipsis;flex:1;margin:0 40px 0 0;font-size:18px;overflow:hidden}.chat-messages{background-color:var(--chat-bg);box-sizing:border-box;-webkit-overflow-scrolling:touch;flex-direction:column;flex:1;gap:10px;width:100%;padding:15px 10px;display:flex;overflow-y:auto}.msg-bubble{word-break:break-word;border-radius:18px;max-width:75%;padding:10px 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22px;font-weight:700;box-shadow:0 2px 5px #ff4d6d33}.profile-header{text-align:center;width:100%;padding:10px 0}.profile-card{background-color:var(--card-bg-color);border:1px solid var(--card-border-color);box-sizing:border-box;border-radius:20px;width:100%;max-width:400px;padding:25px;box-shadow:0 4px 15px #0000000d}.input-group{text-align:left;flex-direction:column;margin-bottom:20px;display:flex}.input-group label{color:var(--text-color);opacity:.8;margin-bottom:8px;font-size:14px;font-weight:600}.input-group input{border:1px solid var(--card-border-color);background-color:var(--bg-color);color:var(--text-color);border-radius:12px;outline:none;padding:12px 15px;font-size:16px;transition:border-color .2s}.input-group input:focus{border-color:var(--accent-color)}.mbti-select{border:1px solid var(--card-border-color);background-color:var(--bg-color);color:var(--text-color);cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' 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