:root{--bg:#f6f7fb;--panel:#fff;--panel-soft:#f7f8fc;--text:#20243a;--sub:#7e849a;--line:#eceef5;--accent:#6861ed;--accent-dark:#544de0;--accent-soft:#efedff;--green:#34b995;--danger:#e65e75;--shadow:0 20px 60px #25254b14;--rail:#fdfdff;--chat-bg:#f7f8fc;--bubble:#fff;--radius:18px;color-scheme:light}
:root[data-theme=dark]{--bg:#12141e;--panel:#1b1e2b;--panel-soft:#222536;--text:#eeeef8;--sub:#979db7;--line:#2d3144;--accent:#8982ff;--accent-dark:#756df4;--accent-soft:#302c50;--green:#4cd7ad;--danger:#fa8193;--shadow:0 20px 60px #0004;--rail:#171a25;--chat-bg:#151824;--bubble:#242838;color-scheme:dark}
*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden}body{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);font-size:14px;-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{border:0;cursor:pointer;background:none;color:inherit;touch-action:manipulation}button:disabled{opacity:.45;cursor:not-allowed}a{color:var(--accent);text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #918afa77;outline-offset:3px}input,textarea,select{background:var(--panel-soft);border:1px solid var(--line);border-radius:12px;padding:12px 14px;color:var(--text);width:100%;outline:none}input:focus,textarea:focus,select:focus{border-color:var(--accent)}textarea{resize:none}input::placeholder,textarea::placeholder{color:#9ba0b4}h1,h2,h3,p{margin:0}svg.icon{width:22px;height:22px;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round;flex:none}.hidden{display:none!important}.muted{color:var(--sub);line-height:1.8}.primary{display:inline-flex;align-items:center;justify-content:center;gap:20px;background:var(--accent);color:#fff;border-radius:13px;padding:14px 24px;font-weight:600;min-height:48px;transition:background .18s,transform .18s}.primary:hover{background:var(--accent-dark);transform:translateY(-1px)}.secondary{border:1px solid var(--line);border-radius:12px;padding:11px 17px;background:var(--panel-soft)}.danger{background:#ee627518!important;color:white!important}.danger-solid{background:var(--danger)!important;color:#fff!important}.text-button{color:var(--accent);font-weight:600;padding:8px}.field-label{display:block;font-size:13px;font-weight:600;margin:23px 0 10px}.field-help{color:var(--sub);display:block;font-size:11px;line-height:1.8;margin-top:8px}.error-text{color:var(--danger);font-size:12px;line-height:1.7;min-height:20px;margin-top:12px}.section-kicker,.eyebrow{font-size:10px;letter-spacing:2.1px;font-weight:700;color:var(--accent)}.brand-mark{display:flex;align-items:center;justify-content:center;flex:none;color:#fff;background:var(--accent);width:43px;height:43px;border-radius:15px;font-weight:800;font-size:23px;box-shadow:0 5px 16px #6761ee26;position:relative}.brand-mark:after{content:'';position:absolute;width:7px;height:7px;background:var(--accent);bottom:-2px;left:9px;transform:skewY(-30deg)}.brand-mark.large{width:62px;height:62px;border-radius:22px;font-size:31px}.boot{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:25px;color:var(--sub)}
/* Welcome / username-only entry */
.auth-screen{display:grid;grid-template-columns:1.06fr 1fr;height:100%;overflow:auto;background:var(--panel)}.auth-story{min-height:700px;padding:42px 58px 28px;background:#f0effa;position:relative;overflow:hidden;color:#292641;display:flex;flex-direction:column}.auth-brand{display:flex;align-items:center;gap:14px;color:#292641;font-size:23px}.brand-en{display:block;font-size:8px;letter-spacing:2px;font-weight:600;color:#9b97b8;margin-top:3px}.story-content{margin:auto;max-width:500px;padding:52px 0 24px;width:100%}.story-content h1{font-size:clamp(42px,4.1vw,65px);line-height:1.24;letter-spacing:-2px;margin:24px 0}.story-content h1 span{color:#6960eb}.story-content>p{color:#89839e;font-size:15px;line-height:1.9}.story-art{height:220px;max-width:390px;position:relative;margin:28px 0 8px}.art-circle{position:absolute;width:220px;height:220px;border:1px dashed #c8c3e3;border-radius:50%;left:66px;top:0}.art-circle:after{content:'';position:absolute;inset:30px;border:1px solid #ddd8ee;border-radius:50%}.art-chat{position:absolute;display:flex;align-items:center;gap:12px;background:#fff;border-radius:17px;padding:15px 18px;box-shadow:0 12px 32px #685c9730;z-index:1;font-size:13px}.art-chat.one{top:31px;left:0;transform:rotate(-5deg)}.art-chat.two{top:99px;right:0;transform:rotate(4deg);background:#7066e9;color:white}.art-chat small{font-size:7px;display:block;margin-top:5px;letter-spacing:1px;color:#aba5c2}.art-avatar{border-radius:13px;width:39px;height:39px;background:#fff2d5;display:flex;align-items:center;justify-content:center;font-size:23px}.art-avatar.pink{background:#bdb5ff}.art-voice{position:absolute;bottom:7px;left:54px;padding:13px 18px;display:flex;gap:18px;align-items:center;background:#fff;border-radius:15px;transform:rotate(-3deg);box-shadow:0 12px 30px #685c9718;font-size:11px;color:#7368d3;z-index:1}.wave{display:flex;align-items:center;gap:3px;height:25px}.wave i{display:block;width:3px;border-radius:2px;height:11px;background:#a799ed}.wave i:nth-child(3n){height:23px}.wave i:nth-child(4n){height:17px}.wave i:nth-child(5n){height:7px}.art-dot{position:absolute;width:12px;height:12px;border-radius:50%;background:#dcc2a9}.art-dot.one{top:4px;right:57px}.art-dot.two{bottom:31px;right:30px;background:#b8afea;width:9px;height:9px}.story-tags{display:flex;gap:9px;color:#9b95af;font-size:11px;padding-top:20px}.story-tags span{padding:6px 11px;border:1px solid #ded9eb;border-radius:20px}.story-foot{font-size:10px;color:#a7a0b9}.auth-form-wrap{display:flex;align-items:center;justify-content:center;padding:40px}.auth-form-content{max-width:370px;width:100%}.auth-form-content h2{font-size:29px;letter-spacing:-.7px;margin:15px 0 11px}.auth-form-content>.muted{font-size:13px}.input-with-prefix{display:flex;align-items:center;background:var(--panel-soft);border:1px solid var(--line);border-radius:12px;padding-left:16px}.input-with-prefix:focus-within{border-color:var(--accent)}.input-with-prefix>span{color:var(--accent);font-size:18px}.input-with-prefix input{border:0;background:none;padding:15px 12px;outline:none}.auth-submit{width:100%;justify-content:space-between;margin-top:6px;height:52px}.auth-note{font-size:11px;text-align:center;margin:18px 0 27px;color:var(--sub)}.mini-check{display:inline-flex;border-radius:50%;background:var(--accent-soft);color:var(--accent);width:15px;height:15px;align-items:center;justify-content:center;font-size:9px;margin-right:5px}.auth-divider{position:relative;text-align:center;font-size:11px;color:var(--sub);margin-bottom:7px}.auth-divider:before{content:'';position:absolute;height:1px;background:var(--line);left:0;right:0;top:50%}.auth-divider span{position:relative;background:var(--panel);padding:0 15px}.auth-form-content>.text-button{display:block;margin:0 auto;font-size:12px}.auth-fine{font-size:10px;text-align:center;color:#a0a5b5;line-height:1.9;margin-top:32px}.mobile-brand{display:none}
/* Application frame */
.app-shell{display:grid;grid-template-columns:80px 326px minmax(0,1fr);height:100dvh;max-height:100dvh;overflow:hidden}.rail{background:var(--rail);border-right:1px solid var(--line);display:flex;flex-direction:column;align-items:center;padding:28px 0 20px;gap:43px}.rail>.brand-mark{width:40px;height:40px;font-size:22px;border-radius:14px}.rail-tabs,.rail-bottom{display:flex;flex-direction:column;align-items:center;gap:15px}.rail-bottom{margin-top:auto;gap:16px}.nav-button{display:flex;align-items:center;justify-content:center;width:45px;height:45px;border-radius:14px;color:#9599ad;transition:.16s}.nav-button.active{color:var(--accent);background:var(--accent-soft)}.nav-button:hover{color:var(--accent);background:var(--panel-soft)}.profile-button{border:3px solid var(--panel);padding:0;border-radius:50%;box-shadow:0 0 0 1px var(--line)}.profile-button .avatar{width:35px;height:35px;font-size:14px;border-radius:50%}.sidebar{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0;overflow:hidden}.sidebar-header{padding:28px 22px 0}.sidebar-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.sidebar-eyebrow{letter-spacing:2px;font-weight:600;font-size:8px;color:var(--sub)}.sidebar-heading h1{font-size:25px;font-weight:700;display:flex;align-items:center;gap:9px;margin-top:6px;letter-spacing:-.5px}.header-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:5px}.head-actions{display:flex;gap:2px}.icon-button{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;border-radius:11px;color:var(--sub);transition:background .15s,color .15s}.icon-button:hover{background:var(--accent-soft);color:var(--accent)}.icon-button svg{width:20px;height:20px}.add-button{background:var(--accent-soft);color:var(--accent);width:31px;height:31px;margin-top:3px;margin-left:6px;border-radius:10px}.search-box{display:flex;align-items:center;gap:8px;background:var(--panel-soft);border:1px solid transparent;padding:0 12px;border-radius:10px;height:39px}.search-box:focus-within{border-color:var(--accent)}.search-box span{display:flex;color:#a1a5b8}.search-box svg{width:16px;height:16px}.search-box input{border:0;padding:0;min-width:0;outline:none;background:none;font-size:12px}.filter-tabs{display:flex;gap:18px;margin-top:18px;border-bottom:1px solid var(--line)}.filter-tabs button{font-size:11px;color:var(--sub);padding:0 1px 12px;position:relative;white-space:nowrap}.filter-tabs button.active{color:var(--accent);font-weight:600}.filter-tabs button.active:after{content:'';position:absolute;height:2px;background:var(--accent);bottom:-1px;left:0;right:0}.filter-tabs span{margin-left:4px;font-size:9px;background:var(--accent-soft);padding:1px 4px;border-radius:4px}.filter-tabs span:empty{display:none}.sidebar-list{flex:1;overflow:auto;padding:12px 10px;overscroll-behavior:contain}.connection-state{font-size:10px;color:var(--sub);text-align:center;min-height:0}.connection-state:not(:empty){padding:6px;background:var(--accent-soft)}.sidebar-footer{font-size:10px;color:var(--sub);display:flex;gap:7px;align-items:center;padding:17px 24px;border-top:1px solid var(--line)}.status-dot{width:5px;height:5px;border-radius:50%;display:inline-block;background:var(--green)}.room-item{display:flex;gap:12px;padding:15px 12px;border-radius:13px;width:100%;text-align:left;margin-bottom:4px;align-items:center;position:relative;min-height:78px;transition:background .16s}.room-item:hover{background:var(--panel-soft)}.room-item.active{background:var(--accent-soft)}.room-item.active:before{content:'';position:absolute;width:3px;height:28px;background:var(--accent);border-radius:3px;left:-10px}.avatar{height:46px;width:46px;flex-shrink:0;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;background:#e8e5fa;color:#877cc1;font-size:18px;font-weight:600;overflow:hidden;position:relative}.avatar img{width:100%;height:100%;object-fit:cover}.avatar.tone-1{background:#e5f1ed;color:#699888}.avatar.tone-2{background:#f9ecda;color:#bb9561}.avatar.tone-3{background:#f5e6ea;color:#b7808e}.avatar.tone-4{background:#e5edf8;color:#7998c4}.avatar.tone-5{background:#eae9f3;color:#9390aa}.avatar.group-avatar{background:#eae7fb;color:#8273cf}.avatar.group-avatar svg{width:23px;height:23px}.avatar-wrap{position:relative;flex-shrink:0}.online-badge{position:absolute;width:10px;height:10px;border:2px solid var(--panel);background:var(--green);border-radius:50%;right:-1px;bottom:1px}.room-content{min-width:0;flex:1}.room-line{display:flex;align-items:center;gap:6px;justify-content:space-between}.room-name{font-size:13px;font-weight:650;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.room-time{font-size:9px;color:#9a9fb3;white-space:nowrap;flex-shrink:0}.room-preview{font-size:11px;color:var(--sub);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.6;margin-top:7px;max-width:203px}.unread-badge{background:var(--accent);color:white;font-weight:600;font-size:9px;min-width:17px;height:17px;border-radius:7px;padding:2px 5px;text-align:center;flex-shrink:0;margin-left:6px}.pin-mark{color:#a1a0b9;font-size:10px;margin-left:auto}.empty-list{padding:48px 20px;text-align:center;color:var(--sub);font-size:12px;line-height:1.9}.empty-list .empty-icon{margin:0 auto 16px;width:48px;height:48px;border-radius:17px;background:var(--panel-soft);display:flex;align-items:center;justify-content:center;color:#b2adcd}.empty-list .text-button{display:block;margin:12px auto}.list-section-label{font-size:10px;color:var(--sub);padding:12px 14px 7px;letter-spacing:.5px}.contact-handle{font-size:10px;color:var(--sub);margin-top:5px}.main-panel{position:relative;min-width:0;height:100%;background:var(--chat-bg)}.welcome{height:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:30px;text-align:center}.welcome-orbit{width:230px;height:200px;position:relative;display:flex;align-items:center;justify-content:center;margin-bottom:30px}.welcome-orbit:before{content:'';position:absolute;width:198px;height:198px;border:1px dashed #cfcae4;border-radius:50%;transform:rotate(22deg)}.welcome-orbit:after{content:'';position:absolute;width:140px;height:140px;background:var(--accent-soft);border-radius:50%}.welcome-bubble{position:relative;z-index:1;display:flex;gap:6px;align-items:center;background:var(--panel);box-shadow:var(--shadow);color:var(--accent);font-size:29px;letter-spacing:5px;font-weight:600;transform:rotate(-8deg);padding:23px 27px;border-radius:23px}.welcome-bubble:after{content:'';position:absolute;bottom:-10px;left:22px;width:20px;height:20px;background:var(--panel);transform:skewY(-25deg)}.welcome-bubble span{font-size:18px;position:absolute;right:-12px;top:-7px;color:#c6add6}.orbit-icon{position:absolute;z-index:2;display:flex;align-items:center;justify-content:center;border:5px solid var(--chat-bg);width:49px;height:49px;border-radius:18px}.orbit-icon.one{background:#f6e9d7;color:#bf9a62;left:2px;top:20px;transform:rotate(-12deg);font-size:28px}.orbit-icon.two{background:#e3eeea;color:#77a693;right:4px;bottom:12px;transform:rotate(15deg);font-size:27px}.welcome .section-kicker{font-size:8px;letter-spacing:2px;color:#a7a0bd}.welcome h2{font-size:25px;letter-spacing:-.6px;margin:17px 0 13px;font-weight:650}.welcome>p{line-height:1.95;color:var(--sub);font-size:12px}.welcome>.primary{font-size:12px;padding:11px 20px;min-height:43px;margin-top:24px;border-radius:12px}.welcome-features{display:flex;gap:25px;margin-top:55px;color:#a4a7b9;font-size:9px}.welcome-features span:not(:last-child):after{content:'·';margin-left:25px}
/* Conversation */
.conversation{height:100%;display:flex;flex-direction:column;position:relative}.chat-header{height:90px;min-height:90px;padding:0 31px;display:flex;align-items:center;background:var(--panel);border-bottom:1px solid var(--line);gap:12px}.chat-identity{display:flex;align-items:center;gap:12px;text-align:left;min-width:0;padding:0}.chat-identity .avatar{width:42px;height:42px;font-size:17px;border-radius:14px}.chat-title{font-weight:650;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:320px}.chat-subtitle{font-size:10px;color:var(--sub);margin-top:6px}.chat-subtitle .status-dot{margin-right:5px}.chat-header-actions{margin-left:auto;display:flex;align-items:center;gap:9px}.chat-header-actions>.icon-button:first-child{color:var(--accent);background:var(--accent-soft)}.header-separator{height:20px;border-left:1px solid var(--line);margin:0 4px}.mobile-back{display:none}.messages{flex:1;overflow:auto;min-height:0;padding:23px 36px 10px;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#dcdde8 transparent;position:relative}.date-divider{display:flex;align-items:center;justify-content:center;gap:15px;font-size:9px;color:#a3a7b8;margin:8px 0 27px}.date-divider:before,.date-divider:after{content:'';height:1px;background:var(--line);width:45px}.message-row{display:flex;gap:11px;margin-bottom:21px;align-items:flex-start;position:relative}.message-row .avatar{width:33px;height:33px;border-radius:11px;font-size:13px;margin-top:3px}.message-row.own{flex-direction:row-reverse}.message-body{min-width:0;max-width:min(75%,570px);position:relative}.message-sender{font-size:9px;color:var(--sub);margin:0 0 6px 2px;display:flex;gap:9px;align-items:center}.message-row.own .message-sender{flex-direction:row-reverse;margin-right:2px}.bubble{padding:12px 16px;background:var(--bubble);border:1px solid var(--line);border-radius:0 15px 15px 15px;line-height:1.8;font-size:13px;overflow-wrap:anywhere;white-space:pre-wrap;box-shadow:0 2px 2px #27294402}.message-row.own .bubble{background:var(--accent);color:#fff;border-color:var(--accent);border-radius:15px 0 15px 15px;box-shadow:0 3px 9px #635bee12}.bubble a{color:inherit;text-decoration:underline}.message-meta{font-size:9px;color:#a0a5b7;display:flex;gap:7px;align-items:center;margin-top:7px;min-height:13px}.message-row.own .message-meta{justify-content:flex-end}.delivery{padding:0;font-size:9px;color:#a0a5b7;display:flex;gap:3px;align-items:center}.delivery.read{color:var(--accent)}.delivery svg{width:12px;height:12px}.delivery.failed{color:var(--danger);font-weight:600}.message-menu-button{opacity:0;position:absolute;right:-30px;top:20px;width:25px;height:27px;color:#a3a6b8}.message-row.own .message-menu-button{left:-30px;right:auto}.message-row:hover .message-menu-button,.message-row:focus-within .message-menu-button{opacity:1}.message-menu-button svg{width:16px;height:16px}.message-row.recalled,.message-row.system{justify-content:center;margin:15px 0 24px;color:#a3a7b7;font-size:10px;line-height:1.6}.system-pill{background:var(--line);border-radius:20px;padding:5px 12px;font-size:10px;color:var(--sub);display:inline-flex;align-items:center;gap:6px}.system-pill svg{width:12px;height:12px}.bubble.media-bubble{padding:5px;line-height:1;overflow:hidden;white-space:normal}.message-image{max-width:100%;max-height:290px;min-width:90px;display:block;border-radius:10px;object-fit:cover;cursor:zoom-in}.message-video{display:block;max-width:100%;max-height:320px;width:290px;border-radius:10px;background:#111}.message-audio{width:248px;max-width:100%;height:38px;display:block}.audio-label{font-size:10px;line-height:1.4;margin:3px 8px 6px;opacity:.65}.bubble.audio-bubble{padding:10px 9px;max-width:290px}.bubble.file-bubble{white-space:normal;min-width:230px}.file-card{display:flex;align-items:center;gap:11px;text-decoration:none!important}.file-icon{height:38px;width:34px;border-radius:8px;background:#8d88fb20;color:var(--accent);display:flex;align-items:center;justify-content:center;flex-shrink:0}.own .file-icon{background:#fff2;color:white}.file-name{font-size:11px;overflow:hidden;text-overflow:ellipsis;max-width:190px;white-space:nowrap}.file-size{font-size:9px;opacity:.6;margin-top:4px}.reply-quote{display:block;font-size:10px;border-left:2px solid #aaa6df;padding:7px 10px;margin:0 0 9px;background:#8180b10d;border-radius:0 7px 7px 0;line-height:1.6;white-space:normal;opacity:.8}.own .reply-quote{border-color:#fff7;background:#ffffff15}.reply-quote strong{font-size:10px;display:block;margin-bottom:2px}.reaction-pills{display:flex;gap:4px;margin-top:5px}.reaction-pills button{padding:2px 7px;background:var(--panel);border:1px solid var(--line);border-radius:12px;font-size:10px}.load-more{display:block;margin:0 auto 20px;color:var(--sub);font-size:11px;background:var(--panel);padding:7px 15px;border-radius:20px;border:1px solid var(--line)}.empty-chat{display:flex;flex-direction:column;align-items:center;justify-content:center;height:75%;gap:12px;color:var(--sub);font-size:12px}.empty-chat .avatar{width:65px;height:65px;font-size:25px;border-radius:23px;margin-bottom:8px}.typing-line{font-size:10px;color:var(--sub);height:20px;min-height:20px;padding-left:39px}.composer-wrap{padding:0 28px 16px;position:relative;flex:none;background:var(--chat-bg)}.composer{border:1px solid var(--line);background:var(--panel);border-radius:15px;padding:7px;display:flex;align-items:flex-end;gap:3px;box-shadow:0 4px 18px #36325203}.composer textarea{background:none;border:none;border-radius:0;resize:none;line-height:1.6;min-height:38px;max-height:125px;outline:none!important;padding:9px 8px;font-size:12px;scrollbar-width:thin;flex:1}.composer .icon-button{width:35px;height:37px}.composer .icon-button svg{width:20px;height:20px}.send-button{background:var(--accent);width:38px;height:37px;min-width:38px;display:flex;align-items:center;justify-content:center;border-radius:11px;color:#fff;margin-left:3px}.send-button svg{height:19px;width:19px}.composer-hint{display:flex;justify-content:space-between;color:#aaadbd;font-size:8px;padding:11px 7px 0}.reply-bar{background:var(--accent-soft);border-radius:10px;padding:10px 13px;margin-bottom:8px;display:flex;align-items:center;gap:10px;color:var(--sub);font-size:11px;border-left:3px solid var(--accent)}.reply-bar strong{font-size:10px;color:var(--accent);display:block;margin-bottom:2px}.reply-bar p{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:430px;font-size:10px}.reply-bar>.icon-button{margin-left:auto;width:25px;height:25px}.upload-progress{margin-bottom:8px;padding:9px 12px;border-radius:9px;background:var(--accent-soft);font-size:11px;color:var(--accent);position:relative;overflow:hidden}.upload-progress .progress-fill{height:2px;bottom:0;left:0;position:absolute;background:var(--accent)}.emoji-picker{position:absolute;bottom:100%;left:28px;max-width:330px;background:var(--panel);box-shadow:var(--shadow);border:1px solid var(--line);border-radius:16px;padding:12px;display:grid;grid-template-columns:repeat(8,1fr);gap:3px;z-index:8}.emoji-picker button{font-size:22px;border-radius:8px;padding:7px 4px}.emoji-picker button:hover{background:var(--panel-soft)}.voice-bar{flex:1;height:38px}.voice-bar button{background:var(--panel-soft);height:100%;border-radius:8px;width:100%;font-size:11px;color:var(--sub);user-select:none;-webkit-user-select:none;touch-action:none}.voice-bar button.recording{background:var(--accent-soft);color:var(--accent)}.new-message-button{position:absolute;bottom:140px;right:32px;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--panel);padding:8px 15px;border-radius:20px;color:var(--accent);font-size:11px;z-index:4}.active-call-banner{display:flex;align-items:center;gap:10px;background:var(--accent-soft);color:var(--accent);font-size:11px;padding:11px 33px}.active-call-banner button{margin-left:auto;font-weight:600;font-size:11px}.active-call-banner svg{width:16px;height:16px}.drag-over:after{content:'松开发送文件';position:absolute;inset:12px;background:#6861edee;border:2px dashed white;border-radius:20px;z-index:10;display:flex;align-items:center;justify-content:center;color:#fff;font-size:24px}
/* Dialogs / settings / contacts */
.modal-backdrop{position:fixed;inset:0;z-index:50;background:#17172d66;backdrop-filter:blur(5px);display:flex;align-items:center;justify-content:center;padding:24px;animation:fade-in .15s}.modal{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:24px;width:100%;max-width:460px;max-height:88dvh;display:flex;flex-direction:column;overflow:hidden}.modal.wide{max-width:620px}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:21px 25px 14px;gap:14px;border-bottom:1px solid var(--line)}.modal-header h2{font-size:17px}.modal-header .icon-button{width:31px;height:31px}.modal-body{padding:21px 25px 25px;overflow:auto;overscroll-behavior:contain}.modal-body p{line-height:1.8;font-size:12px;color:var(--sub)}.modal-body .field-label:first-child{margin-top:0}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}.modal-actions>*{font-size:12px}.modal .primary{padding:11px 19px;min-height:42px}.modal-option{display:flex;width:100%;align-items:center;gap:13px;padding:13px 4px;border-bottom:1px solid var(--line);text-align:left;min-height:54px}.modal-option:last-child{border-bottom:0}.modal-option>svg{color:var(--accent);width:20px;height:20px}.modal-option strong{display:block;font-size:12px;font-weight:550}.modal-option small{display:block;font-size:10px;color:var(--sub);margin-top:5px;line-height:1.5}.modal-option .chevron{margin-left:auto;color:var(--sub);font-size:17px}.modal-option.danger{border-radius:10px;padding-left:12px;margin-top:14px}.profile-card{display:flex;flex-direction:column;align-items:center;text-align:center;padding:5px 0 18px;gap:8px}.profile-card .avatar{width:76px;height:76px;border-radius:25px;font-size:28px}.profile-card h3{font-size:20px;margin-top:7px}.profile-card small{color:var(--sub);font-size:11px}.profile-card .tag{background:var(--accent-soft);color:var(--accent);font-size:9px;padding:4px 9px;border-radius:12px;margin-top:2px}.recovery-box{font:12px/1.9 ui-monospace,SFMono-Regular,Consolas,monospace;word-break:break-all;padding:17px;background:var(--accent-soft);color:var(--accent);border:1px dashed #9d97e9;border-radius:12px;user-select:all;margin:17px 0}.notice{background:var(--panel-soft);padding:12px 14px;border-radius:12px;font-size:11px!important;color:var(--sub);line-height:1.9!important;margin:13px 0}.notice.warning{background:#dbac4210;color:#ab883d}.member-picker{max-height:330px;overflow:auto;margin:13px 0}.person-row{display:flex;align-items:center;gap:11px;padding:11px 2px;border-bottom:1px solid var(--line);width:100%;text-align:left}.person-row:last-child{border-bottom:none}.person-row .avatar{width:38px;height:38px;border-radius:13px;font-size:14px}.person-row .person-info{flex:1;min-width:0}.person-row strong{font-size:12px}.person-row small{display:block;font-size:10px;color:var(--sub);margin-top:5px}.person-row input[type=checkbox]{width:17px;height:17px;accent-color:var(--accent);padding:0}.person-row>.secondary,.person-row>.text-button{font-size:11px;padding:6px 10px;min-height:30px}.profile-page{padding:15px}.settings-row{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:15px 0;border-bottom:1px solid var(--line);font-size:12px}.settings-row input[type=checkbox]{width:19px;height:19px;accent-color:var(--accent)}.settings-row select{width:auto;max-width:190px;font-size:11px;padding:8px}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0}.stat{background:var(--panel-soft);border-radius:12px;padding:15px 12px}.stat strong{display:block;font-size:21px;color:var(--accent);margin-bottom:6px;font-weight:600}.stat small{font-size:10px;color:var(--sub)}.storage-meter{height:7px;background:var(--line);border-radius:9px;margin:15px 0 9px;overflow:hidden}.storage-meter i{background:var(--accent);display:block;height:100%;border-radius:9px}.checks{background:var(--panel-soft);padding:12px 14px;border-radius:12px;margin-top:15px}.check-row{font-size:11px;line-height:2.3;display:flex;align-items:center;justify-content:space-between;gap:10px}.check-row .pass{color:var(--green)}.check-row .warn{color:#b99a50}.modal-divider{height:1px;background:var(--line);margin:20px 0}.receipts-group h3{font-size:12px;margin:12px 0}.reaction-picker{display:flex;justify-content:space-between;gap:3px;margin-bottom:10px}.reaction-picker button{font-size:23px;padding:5px;border-radius:8px}.reaction-picker button:hover{background:var(--accent-soft)}.lightbox{max-width:900px}.lightbox .modal-body{text-align:center}.lightbox img{max-width:100%;max-height:70dvh;object-fit:contain;border-radius:8px}.recording-preview{text-align:center;padding:20px 0}.recording-orb{display:flex;align-items:center;justify-content:center;border-radius:50%;height:90px;width:90px;background:var(--accent-soft);color:var(--accent);margin:0 auto 20px}.recording-orb svg{width:34px;height:34px}.recording-orb.active{animation:record-pulse 1.2s infinite}.recording-time{font-size:27px;letter-spacing:2px;margin-bottom:10px}.recording-preview audio{width:100%;margin:12px 0}.recording-hud{position:fixed;bottom:170px;left:50%;transform:translateX(-50%);z-index:70;background:#27233eef;color:#fff;padding:26px 34px;border-radius:23px;text-align:center;box-shadow:var(--shadow);pointer-events:none;min-width:210px}.recording-hud .wave{justify-content:center;height:40px;margin-bottom:12px}.recording-hud small{font-size:10px;color:#d2cfea}.recording-hud.cancel{background:#a24454ef}.search-result{padding:12px 0;border-bottom:1px solid var(--line)}.search-result small{font-size:10px;color:var(--accent)}.search-result p{margin-top:6px;white-space:pre-wrap}.search-result time{display:block;font-size:9px;color:var(--sub);margin-top:5px}.toast-root{position:fixed;bottom:35px;left:50%;transform:translateX(-50%);z-index:100;display:flex;flex-direction:column;gap:8px;max-width:min(90%,460px);pointer-events:none}.toast{background:#29283fec;color:#fff;border-radius:13px;box-shadow:0 6px 25px #14132125;padding:12px 20px;font-size:12px;text-align:center;line-height:1.7;animation:fade-in .15s}.toast.error{background:#843f53f2}.mobile-nav{display:none}
/* Voice / video calls */
.incoming-card{position:fixed;top:25px;right:28px;width:340px;max-width:calc(100vw - 30px);background:var(--panel);border:1px solid var(--line);z-index:85;box-shadow:var(--shadow);border-radius:22px;padding:21px;animation:slide-in .25s}.incoming-card .incoming-top{display:flex;gap:13px;align-items:center}.incoming-card strong{font-size:14px}.incoming-card p{font-size:11px;color:var(--sub);margin-top:6px}.incoming-actions{display:flex;gap:10px;margin-top:19px}.incoming-actions button{flex:1;min-height:41px;font-size:12px;border-radius:12px}.call-panel{position:fixed;inset:0;background:#121524;z-index:80;color:#fff;display:flex;flex-direction:column;padding:max(env(safe-area-inset-top),25px) 35px max(env(safe-area-inset-bottom),27px)}.call-topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:25px}.call-topbar h2{font-size:18px;font-weight:550}.call-topbar p{font-size:11px;color:#9199b6;margin-top:7px;line-height:1.7}.call-topbar .icon-button{color:#bcc2d7}.call-label{font-size:10px;letter-spacing:1px;color:#9593d9;display:flex;gap:7px;align-items:center}.call-label .status-dot{background:#a8a0ff}.call-grid{flex:1;min-height:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:minmax(0,1fr);gap:15px;width:100%;max-width:1180px;margin:0 auto}.call-grid.count-1{grid-template-columns:minmax(0,1fr);max-width:700px}.call-grid.count-3,.call-grid.count-4{grid-template-columns:repeat(2,minmax(0,1fr))}.call-grid.count-5,.call-grid.count-6{grid-template-columns:repeat(3,minmax(0,1fr))}.call-tile{position:relative;overflow:hidden;border-radius:24px;background:#20253a;min-height:120px;display:flex;align-items:center;justify-content:center;border:1px solid #31374d}.call-tile video{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}.call-tile.local video{transform:scaleX(-1)}.call-tile .call-avatar{z-index:1;display:flex;flex-direction:column;align-items:center;gap:20px;pointer-events:none}.call-tile .avatar{width:92px;height:92px;font-size:33px;border-radius:33px}.call-tile .call-name-center{font-size:15px;color:#b8bfd4}.call-tile.video-on .call-avatar{display:none}.call-tile-label{position:absolute;z-index:3;bottom:15px;left:15px;border-radius:11px;padding:7px 11px;background:#131628a6;display:flex;align-items:center;gap:8px;font-size:11px;color:#dbe0f2}.call-tile-label svg{width:13px;height:13px}.peer-status{position:absolute;right:15px;bottom:20px;font-size:10px;color:#abb1cb;z-index:4}.call-controls{display:flex;justify-content:center;align-items:center;gap:19px;padding-top:27px;flex-shrink:0}.call-control{display:flex;flex-direction:column;align-items:center;gap:8px;color:#9ca4bf;font-size:10px;min-width:60px}.call-control>span{display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:18px;background:#272c42;color:#eef0ff}.call-control.active>span{background:#f1efff;color:#595172}.call-control.end>span{background:#f16d81;color:white;width:66px}.call-control:hover>span{filter:brightness(1.2)}.call-notice{font-size:11px;text-align:center;color:#b8b0e0;margin:13px 0 0;min-height:17px}.call-minimized{inset:auto 20px 25px auto;width:250px;height:84px;padding:12px 16px;border-radius:20px;box-shadow:var(--shadow);cursor:pointer}.call-minimized .call-topbar{margin:0}.call-minimized .call-topbar h2{font-size:13px}.call-minimized .call-grid,.call-minimized .call-controls,.call-minimized .call-notice,.call-minimized .call-label{display:none}.call-minimized .call-topbar p{font-size:10px}.call-minimized .call-topbar .icon-button{display:none}.call-minimized:after{content:'点击返回通话 ↗';position:absolute;bottom:11px;right:15px;font-size:9px;color:#9793d4}
@keyframes fade-in{from{opacity:0}to{opacity:1}}@keyframes slide-in{from{transform:translateY(-15px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes record-pulse{0%,100%{box-shadow:0 0 0 0 #8d85e52a}50%{box-shadow:0 0 0 14px #8d85e509}}
@media(min-width:1500px){.app-shell{grid-template-columns:86px 356px minmax(0,1fr)}.messages{padding-left:7%;padding-right:7%}.composer-wrap{padding-left:6%;padding-right:6%}.chat-header{padding-left:6%;padding-right:5%}.room-item{padding-top:17px;padding-bottom:17px}}
@media(max-width:1050px){.app-shell{grid-template-columns:66px 294px minmax(0,1fr)}.rail{padding-top:25px}.rail>.brand-mark{width:35px;height:35px}.sidebar-header{padding-left:18px;padding-right:18px}.chat-header{padding:0 21px}.chat-header-actions{gap:1px}.chat-title{max-width:200px}.messages{padding-left:22px;padding-right:22px}.message-body{max-width:78%}.composer-wrap{padding-left:17px;padding-right:17px}.message-menu-button{right:-23px}.message-row.own .message-menu-button{left:-23px}.auth-story{padding:34px}.story-art{transform:scale(.9);transform-origin:left center}.auth-form-wrap{padding:32px}}
@media(max-width:720px){body{font-size:14px}.auth-screen{grid-template-columns:1fr}.auth-story{display:none}.auth-form-wrap{min-height:100dvh;padding:35px 30px 45px;align-items:center}.auth-form-content{max-width:400px}.mobile-brand{display:flex;align-items:center;gap:13px;margin-bottom:54px;font-size:25px}.mobile-brand .brand-mark{width:40px;height:40px;font-size:22px}.auth-form-content h2{font-size:30px}.auth-fine{margin-top:28px}.auth-form-content .section-kicker{font-size:9px}.app-shell{display:flex;flex-direction:column;height:100dvh;max-height:100dvh}.rail{display:none}.sidebar{width:100%;flex:1;border:0;padding-top:env(safe-area-inset-top);min-height:0}.sidebar-header{padding:21px 23px 0}.sidebar-heading{margin-bottom:20px}.sidebar-heading h1{font-size:27px;margin-top:5px}.sidebar-eyebrow{font-size:8px}.sidebar .icon-button{width:37px;height:37px}.sidebar .add-button{width:32px;height:32px}.head-actions{gap:7px}.search-box{height:42px;border-radius:12px}.search-box input{font-size:13px}.filter-tabs{gap:27px;margin-top:20px}.filter-tabs button{font-size:12px;padding-bottom:13px}.sidebar-list{padding:12px 13px}.room-item{padding:15px 12px;min-height:84px;margin-bottom:3px;border-radius:14px;gap:14px}.room-item.active:before{display:none}.room-name{font-size:14px}.room-preview{font-size:12px;max-width:calc(100vw - 130px);margin-top:7px}.room-time{font-size:10px}.room-item .avatar{height:48px;width:48px;font-size:19px;border-radius:17px}.sidebar-footer{display:none}.main-panel{display:none}.mobile-nav{display:flex;align-items:center;justify-content:space-around;background:var(--panel);border-top:1px solid var(--line);padding:8px 8px calc(8px + env(safe-area-inset-bottom));z-index:5;flex-shrink:0}.mobile-nav button{display:flex;align-items:center;flex-direction:column;gap:5px;min-width:60px;color:#a2a7bc;position:relative}.mobile-nav button>span{display:flex;width:45px;height:28px;align-items:center;justify-content:center;border-radius:9px}.mobile-nav button.active>span{background:var(--accent-soft);color:var(--accent)}.mobile-nav button.active{color:var(--accent)}.mobile-nav small{font-size:9px}.mobile-nav .icon{height:21px;width:21px}.mobile-nav .mobile-badge{position:absolute;top:-1px;right:10px;background:var(--accent);color:#fff;padding:1px 4px;border-radius:6px;font-size:8px;min-width:13px;height:13px;text-align:center}.app-shell.chat-open .sidebar,.app-shell.chat-open .mobile-nav{display:none}.app-shell.chat-open .main-panel{display:block;flex:1;width:100%;height:100dvh}.chat-header{height:calc(72px + env(safe-area-inset-top));min-height:calc(72px + env(safe-area-inset-top));padding:env(safe-area-inset-top) 13px 0 6px;gap:3px}.mobile-back{display:inline-flex;width:34px;min-width:34px}.chat-identity{gap:10px}.chat-identity .avatar{width:37px;height:37px;border-radius:13px;font-size:15px}.chat-title{font-size:14px;max-width:135px}.chat-subtitle{font-size:9px;margin-top:5px}.chat-header-actions{gap:2px;margin-left:auto}.chat-header-actions .icon-button{width:32px;height:34px;border-radius:10px}.chat-header-actions .icon-button svg{width:19px;height:19px}.chat-header-actions .header-separator{display:none}.chat-header-actions [data-action=search-messages]{display:none}.chat-header-actions>.icon-button:first-child{background:none;color:var(--sub)}.messages{padding:20px 15px 8px}.date-divider{font-size:9px;margin-bottom:23px}.message-row{gap:8px;margin-bottom:20px}.message-row .avatar{height:31px;width:31px;font-size:12px;border-radius:10px;margin-top:3px}.message-body{max-width:calc(100% - 80px)}.bubble{font-size:13px;padding:10px 13px;line-height:1.8;border-radius:0 14px 14px 14px}.message-row.own .bubble{border-radius:14px 0 14px 14px}.message-sender{font-size:9px}.message-menu-button{opacity:.7;right:-24px;top:22px;width:21px;height:23px}.message-row.own .message-menu-button{left:-24px;right:auto}.message-menu-button svg{height:14px;width:14px}.message-image{max-height:240px}.message-video{width:230px;max-height:270px}.bubble.audio-bubble{max-width:235px}.message-audio{width:220px;height:35px}.bubble.file-bubble{min-width:200px;max-width:235px}.file-name{max-width:145px}.message-meta{font-size:8px;margin-top:6px}.delivery{font-size:8px}.typing-line{padding-left:18px;font-size:9px;height:17px;min-height:17px}.composer-wrap{padding:0 10px calc(10px + env(safe-area-inset-bottom))}.composer{padding:5px;border-radius:15px;gap:0;align-items:flex-end}.composer textarea{font-size:14px;padding:9px 7px;min-height:39px;max-height:110px}.composer .icon-button{width:32px;height:39px}.composer .icon-button svg{width:20px;height:20px}.composer .send-button{height:35px;width:35px;min-width:35px;margin:2px 2px 2px 3px;border-radius:11px}.composer-hint{display:none}.reply-bar{margin-bottom:7px;font-size:10px;padding:8px 11px}.reply-bar p{max-width:calc(100vw - 110px)}.emoji-picker{left:10px;max-width:calc(100vw - 20px);width:340px;grid-template-columns:repeat(8,1fr);bottom:100%;padding:10px}.emoji-picker button{font-size:23px;padding:8px 3px}.active-call-banner{padding:10px 16px;font-size:10px}.new-message-button{bottom:100px;right:17px;font-size:10px}.modal-backdrop{padding:16px;align-items:center}.modal{max-height:89dvh;border-radius:22px}.modal-header{padding:18px 20px 13px}.modal-header h2{font-size:17px}.modal-body{padding:19px 20px 23px}.modal-body input,.modal-body textarea,.modal-body select,.auth-form-content input{font-size:16px}.modal-actions .primary,.modal-actions .secondary{font-size:12px}.modal.sheet{border-radius:23px 23px 0 0;max-height:85dvh}.modal-backdrop.sheet-backdrop{padding:0;align-items:flex-end}.modal.sheet .modal-body{padding-bottom:calc(23px + env(safe-area-inset-bottom))}.toast-root{bottom:calc(90px + env(safe-area-inset-bottom));width:max-content}.toast{font-size:12px;padding:12px 18px}.incoming-card{top:calc(12px + env(safe-area-inset-top));left:15px;right:15px;width:auto;border-radius:22px}.call-panel{padding:max(env(safe-area-inset-top),20px) 13px calc(24px + env(safe-area-inset-bottom))}.call-topbar{margin-bottom:16px;padding:0 8px;gap:7px}.call-topbar h2{font-size:16px}.call-topbar p{font-size:10px;max-width:235px}.call-label{font-size:8px}.call-grid{gap:9px;grid-template-columns:1fr;grid-auto-rows:minmax(0,1fr)}.call-grid.count-2{grid-template-columns:1fr}.call-grid.count-3,.call-grid.count-4,.call-grid.count-5,.call-grid.count-6{grid-template-columns:repeat(2,minmax(0,1fr))}.call-tile{border-radius:18px;min-height:70px}.call-tile .avatar{height:64px;width:64px;font-size:24px;border-radius:23px}.call-tile .call-avatar{gap:10px}.call-tile .call-name-center{font-size:12px}.call-tile-label{font-size:9px;left:9px;bottom:9px;padding:5px 8px;border-radius:8px}.peer-status{right:9px;bottom:13px;font-size:8px}.call-controls{gap:11px;padding-top:24px}.call-control{min-width:53px;font-size:9px;gap:8px}.call-control>span{width:47px;height:47px;border-radius:16px}.call-control.end>span{width:58px}.call-control svg{width:21px;height:21px}.call-notice{font-size:9px;margin-top:11px}.call-minimized{inset:auto 12px calc(88px + env(safe-area-inset-bottom)) auto;width:220px;height:78px;padding:10px}.call-minimized .call-topbar h2{font-size:12px}.call-minimized .call-topbar p{font-size:9px}.recording-hud{bottom:150px}.welcome{display:none}.profile-page{padding:10px 13px}.profile-page .profile-card{padding-top:20px}.person-row{padding:13px 2px}.stat-grid{gap:8px}.stat{padding:14px 10px}.stat strong{font-size:19px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.chat-title,.chat-subtitle,.contact-handle,.file-size{display:block}.message-avatar{padding:0;display:flex;align-self:flex-start;flex:none}.modal-option .chevron{flex-shrink:0}.voice-bar{align-self:center}.file-card>span:last-child{min-width:0}
/* Constrain the desktop grid row: long threads must scroll inside messages,
   never stretch/scroll the entire application frame. */
.app-shell{grid-template-rows:minmax(0,1fr)}
.app-shell>.rail,.app-shell>.sidebar,.app-shell>.main-panel{min-height:0}
.media-download{display:block;font-size:10px;padding:8px 10px;color:var(--sub)}
.message-row.own .media-download{color:rgba(255,255,255,.9)}