*{box-sizing:border-box}html{font-size:16px}html[data-size=compact]{font-size:14px}html[data-size=large]{font-size:18px}:root{--bg:#fff;--fg:#101010;--muted:#777;--subtle:#aaa;--line:#e9edf1;--surface:#f8fafc;--surface2:#f1f5f9;--hover:#f1f5f9;--active:#eaeff5;--accent:#111;--accentfg:#fff;--danger:#d92d4c;--shadow:0 16px 45px #0002}html[data-theme=dark]{--bg:#080808;--fg:#f9f9f9;--muted:#a3a3a3;--subtle:#666;--line:#242424;--surface:#111;--surface2:#1b1b1b;--hover:#191919;--active:#252525;--accent:#fff;--accentfg:#000;--shadow:0 16px 45px #0008}html,body{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft Yahei",sans-serif;background:var(--bg);color:var(--fg);overflow:hidden;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit;color:inherit}button{background:none;border:0;cursor:pointer}input,select,textarea{outline:0}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid #8da4be;outline-offset:2px}.hidden{display:none!important}.app{height:100dvh;display:flex}.sidebar{width:270px;flex:0 0 270px;background:var(--surface);border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:21;transition:transform .2s ease}.brand{display:flex;align-items:center;gap:9px;padding:23px 19px 19px}.brand img{border-radius:8px}.brand strong{font-size:20px;letter-spacing:-.8px}.brand-sub{font-size:11px;color:var(--muted);background:var(--surface2);padding:3px 6px;border-radius:5px}.sidebar-close{display:none!important;margin-left:auto}.new-chat{margin:7px 14px 25px;display:flex;align-items:center;gap:9px;font-size:.91rem;font-weight:600;border:1px solid var(--line);background:var(--bg);border-radius:12px;padding:12px 14px;text-align:left}.new-chat:hover{background:var(--hover)}.plus{font-size:20px;font-weight:400;line-height:1}.history-head{display:flex;justify-content:space-between;padding:0 20px 10px;font-size:12px;color:var(--muted)}.quiet{font-size:12px;color:var(--muted)}.history-search{margin:2px 14px 10px;padding:10px;border:1px solid var(--line);border-radius:9px;background:var(--bg);width:calc(100% - 28px)}.history{flex:1;overflow:auto;padding:0 10px 20px}.history-item{border-radius:10px;display:flex;align-items:center;gap:8px;min-height:42px;padding:6px 9px;margin:2px 0;color:var(--fg);font-size:13px}.history-item:hover{background:var(--hover)}.history-item.active{background:var(--active)}.history-item-main{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:left}.history-item .hist-ico{color:var(--muted);font-size:15px}.history-actions{display:none;gap:1px}.history-item:hover .history-actions,.history-item.active .history-actions{display:flex}.history-actions button{padding:4px;color:var(--muted)}.history-actions button:hover{color:var(--fg)}.history-empty{text-align:center;font-size:12px;color:var(--muted);padding:20px 8px}.sidebar-bottom{padding:12px;border-top:1px solid var(--line)}.profile{width:100%;display:flex;align-items:center;text-align:left;gap:11px;padding:8px;border-radius:11px}.profile:hover{background:var(--hover)}.profile-avatar{display:grid;place-items:center;background:var(--fg);color:var(--bg);width:32px;height:32px;border-radius:50%;font-weight:bold}.profile-details{display:flex;flex:1;flex-direction:column;gap:3px}.profile-details b{font-size:12px}.profile-details small{color:var(--muted);font-size:11px}.main{min-width:0;flex:1;display:flex;flex-direction:column;position:relative;background:var(--bg)}.topbar{height:63px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 24px;border-bottom:1px solid var(--line)}.top-left,.top-right{display:flex;align-items:center;gap:11px}.app-title{font-weight:700;font-size:17px;letter-spacing:-.5px}.app-title span{font-weight:400;font-size:12px;letter-spacing:0;color:var(--muted);margin-left:7px}.iconbtn{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;font-size:24px;color:var(--muted)}.iconbtn:hover{background:var(--hover);color:var(--fg)}.iconbtn svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.mobile-new{display:none}.chat-scroll{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain}.chat-inner{max-width:850px;margin:0 auto;padding:35px 22px 22px;min-height:100%;display:flex;flex-direction:column}.welcome{margin:auto;display:flex;align-items:center;flex-direction:column;text-align:center;gap:12px;padding:35px 0 70px}.welcome img{border-radius:22px}.welcome h1{font-size:25px;letter-spacing:-.7px;font-weight:600;margin:9px 0 0}.welcome p{font-size:13px;color:var(--muted);margin:0}.thread{display:flex;flex-direction:column;gap:30px;padding-bottom:25px}.message{display:flex;gap:14px;align-items:flex-start;min-width:0}.avatar{width:33px;height:33px;flex-shrink:0;border-radius:11px;display:grid;place-items:center;background:var(--surface2);font-weight:700;font-size:13px}.message.ai .avatar{background:var(--fg);color:var(--bg)}.msg-content{flex:1;min-width:0}.msg-role{color:var(--muted);font-size:11px;margin-bottom:9px;font-weight:600}.msg-body{font-size:14px;line-height:1.85;white-space:normal;overflow-wrap:anywhere}.message.user .msg-body{background:var(--surface);border:1px solid var(--line);border-radius:13px;padding:11px 14px}.msg-body p{margin:0 0 10px}.msg-body p:last-child{margin:0}.msg-body pre{background:var(--surface2);border:1px solid var(--line);padding:13px;border-radius:12px;overflow-x:auto;font-size:12px;line-height:1.6}.msg-body code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.89em}.msg-body :not(pre)>code{background:var(--surface2);padding:2px 4px;border-radius:4px}.msg-body blockquote{border-left:3px solid var(--line);padding-left:12px;color:var(--muted);margin:8px 0}.msg-body h1,.msg-body h2,.msg-body h3{line-height:1.4;margin:15px 0 8px}.msg-body h1{font-size:20px}.msg-body h2{font-size:17px}.msg-body h3{font-size:15px}.msg-body ul,.msg-body ol{padding-left:23px;margin:8px 0}.msg-body a{color:#448bc8}.msg-body table{border-collapse:collapse;display:block;overflow:auto;max-width:100%}.msg-body td,.msg-body th{border:1px solid var(--line);padding:6px 10px}.msg-actions{display:flex;align-items:center;gap:6px;margin-top:8px;min-height:24px;flex-wrap:wrap}.msg-actions button{font-size:11px;color:var(--muted);padding:4px 7px;border-radius:6px}.msg-actions button:hover{background:var(--hover);color:var(--fg)}.msg-actions button:disabled{opacity:.4;cursor:default}.branch-switch{display:inline-flex;align-items:center;gap:2px;color:var(--muted);font-size:11px;margin-left:4px}.branch-switch button{font-size:13px;padding:2px 5px}.streaming-cursor::after{content:'▍';animation:blink 1s steps(1) infinite}@keyframes blink{50%{opacity:0}}.composer-zone{width:100%;flex-shrink:0;max-width:850px;margin:0 auto;padding:0 22px 14px;position:relative}.composer-shell{border:1px solid var(--line);border-radius:17px;box-shadow:0 4px 17px #0000000a;background:var(--bg)}.composer{padding:11px 12px 10px}.composer textarea{width:100%;border:0;background:transparent;resize:none;display:block;font-size:14px;line-height:1.65;min-height:54px;max-height:200px;padding:5px 5px 8px}.composer-tools,.left-tools{display:flex;align-items:center;justify-content:space-between;gap:8px}.model-trigger{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:9px;padding:8px 10px;font-size:12px;max-width:220px}.model-trigger:hover{background:var(--hover)}#modelName{max-width:132px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.model-indicator{width:7px;height:7px;border-radius:50%;background:#80b4a0}.chevron{color:var(--muted)}.draft-hint{color:var(--subtle);font-size:10px}.send-btn{display:grid;place-items:center;flex:0 0 32px;height:32px;border-radius:10px;background:var(--accent);color:var(--accentfg);font-size:22px;line-height:1}.send-btn:disabled{opacity:.4}.composer-caption{text-align:center;font-size:10px;color:var(--subtle);margin-top:9px}.fold-btn{display:none}.shade{display:none}.popover{position:fixed;bottom:104px;left:max(292px,calc((100vw - 850px)/2 + 35px));z-index:30;width:290px;max-width:calc(100vw - 24px);background:var(--bg);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:9px}.popover-title{padding:8px;color:var(--muted);font-size:11px}.model-option{display:block;width:100%;padding:10px 12px;border-radius:8px;text-align:left;font-size:13px}.model-option:hover,.model-option.active{background:var(--surface2)}.model-option small{display:block;font-size:10px;color:var(--muted);margin-top:3px}.popover-manage{border-top:1px solid var(--line);margin-top:7px;padding:12px;text-align:left;width:100%;font-size:12px}.modal-back{position:fixed;inset:0;z-index:70;display:grid;place-items:center;background:#0007;padding:16px}.modal{width:min(640px,100%);max-height:min(86dvh,760px);background:var(--bg);border:1px solid var(--line);border-radius:18px;display:flex;flex-direction:column;box-shadow:var(--shadow)}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:17px 20px;border-bottom:1px solid var(--line)}.modal-head strong{font-size:17px}.tabs{display:flex;gap:9px;padding:10px 17px;border-bottom:1px solid var(--line)}.tabs button{padding:10px 13px;border-radius:9px;color:var(--muted);font-size:13px}.tabs button.active{background:var(--surface2);color:var(--fg);font-weight:600}.modal-body{overflow-y:auto;padding:19px 22px 26px}.field{display:flex;flex-direction:column;gap:7px;margin-bottom:15px}.field label{font-size:12px;color:var(--muted)}.field input,.field select,.field textarea{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:11px 12px;width:100%;font-size:13px}.field textarea{min-height:95px;resize:vertical}.field .hint{font-size:11px;line-height:1.6;color:var(--muted)}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.btn{background:var(--surface2);border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:12px}.btn:hover{filter:brightness(.96)}.btn.primary{background:var(--accent);color:var(--accentfg);border-color:var(--accent)}.btn.danger{color:var(--danger)}.modal-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.section-title{font-size:13px;font-weight:700;margin:12px 0}.provider-card{border:1px solid var(--line);border-radius:11px;padding:13px;margin-bottom:13px}.provider-card-head{display:flex;justify-content:space-between;align-items:center;gap:10px}.provider-card-head small{display:block;color:var(--muted);font-size:11px;margin-top:4px;overflow-wrap:anywhere}.provider-actions{display:flex;gap:8px}.provider-actions button{font-size:12px;color:var(--muted)}.info{font-size:12px;line-height:1.8;color:var(--muted);padding:10px 12px;background:var(--surface);border-radius:11px;margin-bottom:16px}.toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);z-index:100;background:var(--fg);color:var(--bg);padding:10px 15px;border-radius:10px;font-size:12px;max-width:90vw;opacity:0;pointer-events:none;transition:opacity .2s}.toast.show{opacity:1}.empty-action{font-size:12px;color:var(--muted);padding:10px}.collapsed .sidebar{display:none}@media(max-width:800px){.app{height:100dvh}.sidebar{position:fixed;left:0;top:0;bottom:0;width:min(82vw,310px);transform:translateX(-106%);box-shadow:var(--shadow)}.app.mobile-sidebar-open .sidebar{transform:translateX(0)}.sidebar-close{display:grid!important}.shade{display:block;position:fixed;inset:0;z-index:20;pointer-events:none;background:#0000;transition:background .2s}.app.mobile-sidebar-open .shade{pointer-events:auto;background:#0007}.topbar{height:56px;padding:0 13px}.top-left,.top-right{gap:4px}.mobile-new{display:grid}.app-title{font-size:16px;margin-left:4px}.chat-inner{padding:20px 13px}.welcome img{width:72px;height:72px}.welcome h1{font-size:21px}.composer-zone{padding:0 10px max(9px,env(safe-area-inset-bottom));}.composer-shell{border-radius:14px}.composer{padding:8px 9px}.composer textarea{font-size:16px;min-height:45px}.draft-hint{display:none}.fold-btn{position:absolute;top:-30px;right:15px;display:grid;place-items:center;width:29px;height:26px;border:1px solid var(--line);background:var(--bg);border-radius:8px;color:var(--muted)}.composer-zone.folded .composer-shell{display:none}.composer-zone.folded .composer-caption{display:none}.composer-zone.folded{height:13px}.composer-zone.folded .fold-btn{top:-27px}.composer-zone.folded .fold-btn span{transform:rotate(180deg)}.composer-caption{font-size:9px;margin-top:6px}.message{gap:9px}.avatar{width:28px;height:28px;border-radius:9px}.msg-body{font-size:13px}.thread{gap:25px}.popover{left:12px;bottom:110px;width:min(320px,calc(100vw - 24px))}.modal{max-height:92dvh}.modal-body{padding:15px}.field-row{grid-template-columns:1fr}.history-actions{display:flex}}@media(min-width:801px){.collapsed .sidebar{display:none}}

/* Melo. Chat v2 — visually separate left/right chat bubbles */
:root{--font-scale:1;--custom-accent:#111111}
.chat-inner{font-size:calc(1rem * var(--font-scale))}
.thread{gap:18px;padding:18px 8px 32px}
.message{display:flex;gap:9px;align-items:flex-end;max-width:86%;width:fit-content;min-width:0}
.message.ai{align-self:flex-start;flex-direction:row}
.message.user{align-self:flex-end;flex-direction:row-reverse}
.message .avatar{flex:0 0 30px;width:30px;height:30px;font-size:12px}
.message .msg-content{flex:0 1 auto;min-width:0;max-width:100%}
.message.user .msg-role{text-align:right}
.message.user .msg-actions{justify-content:flex-end}
.message .msg-body{padding:11px 14px;border-radius:17px;border:1px solid var(--line);line-height:1.75;min-width:75px}
.message.ai .msg-body{background:var(--surface);border-bottom-left-radius:5px}
.message.user .msg-body{background:var(--surface2);border-color:var(--line);border-bottom-right-radius:5px}
.msg-error{font-size:11px;color:var(--danger);margin-top:5px}
.message .msg-body pre{max-width:100%;white-space:pre;overflow-x:auto}
.message .msg-body p{margin:0 0 8px}
.message .msg-actions{gap:2px}
@media(max-width:800px){.thread{padding:12px 2px 28px;gap:16px}.message{max-width:94%;gap:7px}.message .avatar{width:26px;height:26px;flex-basis:26px}.message .msg-body{padding:10px 12px;font-size:13px}.message .msg-actions button{font-size:11px}}

.message.user .msg-body{border-color:var(--custom-accent)}