:root{--ink:#17212b;--muted:#6e7b87;--line:#dce4e8;--paper:#f7f9f8;--panel:#fff;--teal:#147d78;--teal-dark:#0d625e;--coral:#dc715b;--warm:#f4e9dc}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px}button,input,textarea{font:inherit}button{cursor:pointer;border:0}.shell{height:100dvh;display:flex}.sidebar{width:294px;flex:none;background:#173e41;color:#eef5f2;padding:18px 12px;display:flex;flex-direction:column;gap:12px}.side-top{display:flex;align-items:center;justify-content:space-between;padding:0 6px}.mini-brand{font-size:18px;font-weight:700}.brand-mark,.mini-brand span{display:inline-grid;place-items:center;background:var(--coral);color:#fff;border-radius:5px;font-size:11px;font-weight:800;width:27px;height:27px;margin-right:6px}.side-actions{display:flex;gap:7px}.import,.new-character{display:flex;gap:6px;align-items:center;justify-content:center;border-radius:5px;padding:9px;background:var(--teal);color:#fff;flex:1 1}.import{background:#28575a}.import input{display:none}.side-label{font-size:11px;color:#9eb6b3;letter-spacing:0;margin:10px 7px 0}.character-list,.conversation-list{display:grid;grid-gap:3px;gap:3px;overflow:auto}.character-row,.conversation{display:flex;align-items:center}.character-row>button:first-child,.conversation>button:first-child{color:inherit;background:transparent;text-align:left;display:flex;gap:9px;align-items:center;padding:7px;width:100%;overflow:hidden}.character-row span:last-child,.conversation span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.avatar{display:inline-grid;place-items:center;flex:none;width:27px;height:27px;border-radius:50%;background:var(--warm);color:#a1503d;font-weight:700}.row-tool{background:transparent;color:#9eb6b3;padding:6px;visibility:hidden}.character-row:hover .row-tool,.conversation:hover .row-tool{visibility:visible}.conversation.active{background:#286168;border-radius:4px}.side-empty{color:#9eb6b3;padding:0 8px}.side-footer{margin-top:auto;border-top:1px solid #376165;padding-top:10px;display:flex;justify-content:space-around}.side-footer button{color:#cadbd7;background:transparent;display:flex;gap:6px;align-items:center;padding:6px}.chat{min-width:0;flex:1 1;display:flex;flex-direction:column;background:#f9fbfa}.chat header{height:68px;flex:none;border-bottom:1px solid var(--line);background:#fff;padding:0 28px;display:flex;align-items:center;gap:10px}.chat header small,.chat header strong{display:block}.chat header small{color:var(--muted);font-size:12px;margin-top:2px}.large{width:35px;height:35px}.settings-btn{margin-left:auto}.messages{max-width:850px;width:100%;margin:0 auto;padding:30px 28px;overflow-y:auto;flex:1 1}.message{display:flex;gap:11px;margin-bottom:22px;align-items:flex-start}.message-icon{width:30px;height:30px;display:grid;place-items:center;flex:none;border-radius:5px;background:#e3eceb;color:var(--teal)}.message.user{flex-direction:row-reverse}.message.user .message-icon{background:#f5e4db;color:#b7553c}.message p{white-space:pre-wrap;line-height:1.65;margin:0;max-width:min(76%,650px);background:#fff;padding:10px 13px;border:1px solid #e8eeee;border-radius:5px}.message.user p{background:#dcefed;border-color:#d0e7e4}.message i{color:var(--muted)}.composer{max-width:850px;width:calc(100% - 56px);margin:0 auto 22px;display:flex;align-items:flex-end;gap:10px;background:#fff;border:1px solid var(--line);border-radius:6px;padding:8px}.composer textarea{resize:none;flex:1 1;border:0;outline:0;padding:6px;background:transparent;line-height:1.4}.icon{display:grid;place-items:center;background:transparent;color:var(--muted);padding:7px;border-radius:4px}.icon:hover{background:#edf2f1}.send{background:var(--teal);color:#fff;width:35px;height:35px}.send:hover{background:var(--teal-dark)}.center-state,.empty-chat{flex:1 1;display:grid;place-content:center;text-align:center;color:var(--muted);padding:24px}.empty-chat h2{color:var(--ink);font-size:22px;margin:14px 0 5px}.empty-icon{margin:auto;display:grid;place-items:center;width:62px;height:62px;background:var(--warm);color:var(--coral);border-radius:50%}.primary{background:var(--teal);color:#fff;display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:5px;padding:10px 15px;margin-top:15px}.primary:hover{background:var(--teal-dark)}.toast{position:fixed;top:80px;right:20px;z-index:5;background:#f8dfda;color:#8e3023;padding:10px 10px 10px 14px;border-radius:5px;display:flex;align-items:center;gap:8px}.toast button{background:transparent;color:inherit}.modal-backdrop{position:fixed;inset:0;background:#13242580;z-index:10;display:grid;place-items:center;padding:18px}.modal{position:relative;background:#fff;border-radius:7px;padding:27px;width:min(540px,100%);max-height:90dvh;overflow:auto}.modal h2{margin:0 0 18px;font-size:20px}.close{position:absolute;right:13px;top:12px}.editor{display:grid;grid-gap:13px;gap:13px}.editor label{display:grid;grid-gap:6px;gap:6px;color:#40515c}.editor input,.editor textarea{width:100%;border:1px solid #ccd8d7;border-radius:4px;padding:9px;outline-color:var(--teal)}.editor textarea{min-height:62px;resize:vertical}.editor output{float:right;color:var(--teal)}.editor .hint{margin:0;color:var(--muted);font-size:12px;line-height:1.5}.auth{min-height:100dvh;display:grid;place-items:center;background:linear-gradient(120deg,#e5f0ed,#f7f8f3 55%,#f3e4d7);padding:20px}.auth section{width:min(410px,100%);background:#fff;padding:40px;border:1px solid #e3e9e6;border-radius:7px;box-shadow:0 10px 35px #28444218}.brand-mark{width:45px;height:45px;font-size:15px;margin:0}.eyebrow{font-size:11px;color:var(--teal);margin:18px 0 6px}.auth h1{margin:0;font-size:30px}.sub{color:var(--muted);margin:8px 0 25px}.auth form{display:grid;grid-gap:14px;gap:14px}.auth label{display:grid;grid-gap:6px;gap:6px}.auth input{border:1px solid var(--line);padding:11px;border-radius:4px;outline-color:var(--teal)}.auth .primary{width:100%;margin:5px 0 0}.form-error{color:#a33d30;margin:0}.link-btn{color:var(--teal);background:none;width:100%;margin-top:18px}.mobile-only{display:none}@media(max-width:760px){.sidebar{position:fixed;z-index:9;inset:0 auto 0 0;transform:translateX(-100%);transition:transform .2s;width:min(86vw,320px)}.sidebar.open{transform:translateX(0)}.mobile-only{display:grid}.chat header{padding:0 13px}.messages{padding:20px 13px}.composer{width:calc(100% - 26px);margin-bottom:13px}.message p{max-width:83%}.row-tool{visibility:visible}.modal{padding:23px 19px}.settings-btn{display:none}}