:root{color:#172033;background:#e9edf3;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;--app-height: 100dvh;--surface: #ffffff;--surface-soft: #f7f9fc;--surface-muted: #eef3f8;--text: #172033;--text-muted: #647184;--text-subtle: #8a96a8;--border: #d8e0ea;--border-strong: #c4cedb;--primary: #2563eb;--primary-strong: #1d4ed8;--primary-soft: #e7f0ff;--success: #138a4d;--success-soft: #e2f7ec;--warning: #9a5b00;--warning-soft: #fff3d2;--danger: #b42318;--danger-soft: #fff0ee;--shadow-sm: 0 1px 2px rgba(20, 32, 52, .07);--shadow-md: 0 14px 40px rgba(20, 32, 52, .12);--radius-sm: 8px;--radius-md: 8px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{min-width:320px;overflow:hidden;background:radial-gradient(circle at top left,rgba(37,99,235,.09),transparent 34rem),linear-gradient(180deg,#f5f7fb,#e9edf3)}button,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent}.app-shell{display:grid;grid-template-rows:auto auto minmax(0,1fr) auto;width:min(calc(100% - 32px),960px);height:min(var(--app-height),calc(100dvh - 32px));margin:16px auto;overflow:hidden;background:var(--surface);border:1px solid rgba(216,224,234,.9);border-radius:var(--radius-md);box-shadow:var(--shadow-md)}.chat-header{grid-row:1;display:flex;align-items:center;justify-content:space-between;min-height:76px;padding:max(var(--space-4),env(safe-area-inset-top)) var(--space-5) var(--space-4);border-bottom:1px solid var(--border);background:#fffffff0;gap:var(--space-4)}.header-main{display:grid;min-width:0;gap:var(--space-1)}.header-main h1{margin:0;color:var(--text);font-size:1.22rem;font-weight:720;line-height:1.2;letter-spacing:0}.nickname{display:block;max-width:320px;color:var(--text-muted);font-size:.9rem;font-weight:500;line-height:1.25;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-meta{display:flex;align-items:center;justify-content:flex-end;gap:var(--space-2);color:var(--text-muted);font-size:.875rem;white-space:nowrap}.online-pill,.status{display:inline-flex;align-items:center;min-height:34px;border-radius:999px;border:1px solid var(--border);background:var(--surface-soft);color:var(--text-muted);font-weight:620;padding:0 var(--space-3)}.status{gap:7px}.status-dot{width:8px;height:8px;border-radius:50%;background:currentColor;box-shadow:0 0 0 3px #6471841f}.status-connected{border-color:#138a4d38;background:var(--success-soft);color:var(--success)}.status-reconnecting,.status-connecting{border-color:#9a5b003d;background:var(--warning-soft);color:var(--warning)}.status-disconnected{border-color:#b4231833;background:var(--danger-soft);color:var(--danger)}.clear-button,.composer button,.recall-button{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;font-weight:680;line-height:1;transition:background-color .16s ease,border-color .16s ease,box-shadow .16s ease,color .16s ease,transform .12s ease}.clear-button{min-height:36px;padding:0 13px;border-color:var(--border);background:var(--surface);color:#334155}.clear-button:hover{border-color:var(--border-strong);background:var(--surface-muted)}.clear-button:active,.composer button:active,.recall-button:active{transform:translateY(1px)}.clear-button:focus-visible,.composer textarea:focus-visible,.composer button:focus-visible,.recall-button:focus-visible{outline:3px solid rgba(37,99,235,.18);outline-offset:2px}.clear-countdown{grid-row:2;display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-3) var(--space-5);border-bottom:1px solid rgba(245,158,11,.25);background:linear-gradient(90deg,#fff8e7,#fffaf0);color:var(--warning);font-size:.92rem;font-weight:620}.clear-countdown strong{display:grid;place-items:center;min-width:32px;min-height:32px;border-radius:50%;background:#f59e0b;color:#fff;box-shadow:0 5px 14px #f59e0b40}.message-list{grid-row:3;display:flex;flex-direction:column;min-height:0;margin:0;padding:var(--space-5);list-style:none;overflow-y:auto;overscroll-behavior:contain;background:linear-gradient(180deg,#f7f9fceb,#eff3f8f2),var(--surface-soft);scrollbar-color:#c4cedb transparent;scrollbar-width:thin}.message-list::-webkit-scrollbar{width:10px}.message-list::-webkit-scrollbar-thumb{border:3px solid transparent;border-radius:999px;background:#c4cedb;background-clip:content-box}.empty-message{display:grid;place-items:center;flex:1;min-height:220px;color:var(--text-subtle)}.empty-message span{display:inline-flex;align-items:center;justify-content:center;min-width:112px;min-height:44px;border:1px solid var(--border);border-radius:999px;background:#ffffffc7;box-shadow:var(--shadow-sm);font-size:.92rem;font-weight:640}.message-row{display:flex;margin:6px 0}.self-row{justify-content:flex-end}.peer-row{justify-content:flex-start}.system-row{justify-content:center;margin:var(--space-3) 0}.system-message{display:inline-flex;align-items:center;max-width:min(680px,100%);gap:var(--space-2);padding:7px var(--space-3);border:1px solid rgba(216,224,234,.78);border-radius:999px;background:#ffffffc2;color:var(--text-muted);font-size:.82rem;line-height:1.35;text-align:center;box-shadow:var(--shadow-sm)}.system-message span{overflow-wrap:anywhere}.system-message time{flex:0 0 auto;color:var(--text-subtle)}.message-bubble{position:relative;max-width:min(72%,620px);padding:var(--space-3) var(--space-4);border:1px solid rgba(216,224,234,.72);border-radius:var(--radius-md);background:#fffffff5;box-shadow:var(--shadow-sm);overflow-wrap:anywhere}.peer-row .message-bubble{border-top-left-radius:4px}.self-row .message-bubble{border-color:#2563eb29;border-top-right-radius:4px;background:linear-gradient(180deg,#edf5ff,#e6f0ff)}.message-head{display:flex;align-items:center;gap:7px;margin-bottom:6px;color:var(--text-muted);font-size:.78rem;line-height:1.25}.name-dot{width:9px;height:9px;flex:0 0 auto;border-radius:50%;box-shadow:0 0 0 3px #1720330f}.sender{max-width:190px;overflow:hidden;color:#405067;font-weight:700;text-overflow:ellipsis;white-space:nowrap}.message-head time{color:var(--text-subtle);font-weight:520}.message-bubble p{margin:0;color:var(--text);font-size:.98rem;line-height:1.58;white-space:pre-wrap}.image-message-button{display:block;overflow:hidden;width:min(320px,68vw);max-width:100%;min-width:0!important;min-height:0!important;padding:0!important;border:0!important;border-radius:var(--radius-sm);background:var(--surface-muted);box-shadow:none!important;cursor:zoom-in;line-height:0}.image-message-button:focus-visible{outline:3px solid rgba(37,99,235,.22);outline-offset:3px}.image-message{display:block;width:100%;max-height:360px;object-fit:cover}.image-caption{margin-top:var(--space-2)!important}.recalled-text{color:var(--text-subtle)!important;font-style:italic}.recall-button{min-height:32px;margin-top:var(--space-2);padding:0;border:0;background:transparent;color:#52637a;font-size:.8rem}.recall-button:hover{color:var(--primary)}.composer{grid-row:4;position:relative;padding:var(--space-3) var(--space-5) calc(var(--space-3) + env(safe-area-inset-bottom));border-top:1px solid var(--border);background:#fffffff5}.composer-panel{display:grid;gap:var(--space-2);padding:var(--space-2);border:1px solid var(--border);border-radius:var(--radius-md);background:#fbfdff;box-shadow:0 8px 24px #14203414}.pending-image-row{display:flex;min-width:0}.pending-image-frame{position:relative;display:grid;place-items:center;width:96px;height:72px;overflow:hidden;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-muted);color:var(--text-muted);font-size:.82rem;font-weight:650}.pending-image-frame img{width:100%;height:100%;object-fit:cover}.pending-image-mask{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:#17203373;color:#fff;font-size:.78rem;font-weight:700}.remove-image-button{position:absolute;top:4px;right:4px;min-width:28px!important;min-height:28px!important;padding:0!important;border-radius:50%!important;background:#172033c2!important;color:#fff!important;box-shadow:none!important}.composer textarea{width:100%;min-height:42px;max-height:136px;resize:none;border:0;border-radius:0;padding:7px 8px;color:var(--text);background:transparent;line-height:1.45;overflow-y:auto;transition:background-color .16s ease,border-color .16s ease,box-shadow .16s ease}.composer textarea::placeholder{color:var(--text-subtle)}.composer textarea:hover:not(:disabled){background:transparent}.composer textarea:focus{outline:none}.composer-actions{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3)}.composer-tools{display:flex;align-items:center;gap:var(--space-1)}.tool-button{min-width:44px;min-height:44px;padding:0!important;border-color:transparent!important;border-radius:50%!important;background:transparent!important;color:#405067!important;box-shadow:none!important;font-size:1.35rem}.tool-button:hover:not(:disabled){background:var(--surface-muted)!important;color:var(--primary)!important}.send-button{min-width:44px;min-height:44px;padding:0!important;border-radius:50%!important;background:var(--primary);color:#fff;box-shadow:0 8px 18px #2563eb38;font-size:1.2rem}.send-button:hover:not(:disabled){background:var(--primary-strong);box-shadow:0 10px 22px #2563eb47}.composer button:disabled,.composer textarea:disabled{cursor:not-allowed;opacity:.56}.emoji-popover{position:absolute;left:var(--space-5);right:var(--space-5);bottom:calc(100% - var(--space-2));z-index:20;max-height:min(380px,48vh);overflow:hidden;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);box-shadow:var(--shadow-md)}.emoji-popover em-emoji-picker{width:100%;height:min(360px,46vh);--border-radius: 8px;--rgb-background: 255, 255, 255;--rgb-accent: 37, 99, 235;--rgb-color: 23, 32, 51;--rgb-input: 247, 249, 252}.emoji-loading{display:grid;place-items:center;min-height:180px;color:var(--text-muted);font-weight:650}.image-preview-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;display:grid;place-items:center;padding:max(18px,env(safe-area-inset-top)) max(18px,env(safe-area-inset-right)) max(18px,env(safe-area-inset-bottom)) max(18px,env(safe-area-inset-left));background:#0c121ec7}.image-preview-shell{position:relative;display:grid;max-width:min(96vw,1120px);max-height:92vh;gap:var(--space-3)}.image-preview-full{display:block;max-width:min(96vw,1120px);max-height:calc(92vh - 56px);border-radius:var(--radius-md);background:#fff;object-fit:contain;box-shadow:0 24px 80px #00000057}.image-preview-close{position:absolute;top:10px;right:10px;z-index:1;min-width:44px!important;min-height:44px!important;padding:0!important;border:1px solid rgba(255,255,255,.2)!important;border-radius:50%!important;background:#0c121ead!important;color:#fff!important;box-shadow:none!important;font-size:1.35rem}.image-preview-close:hover{background:#0c121edb!important}.image-preview-caption{justify-self:center;max-width:min(86vw,720px);margin:0;padding:8px var(--space-3);border-radius:var(--radius-sm);background:#ffffffeb;color:var(--text);line-height:1.5;overflow-wrap:anywhere;text-align:center}@media(max-width:760px){body{background:var(--surface-soft)}.app-shell{width:100%;height:var(--app-height);margin:0;border:0;border-radius:0;box-shadow:none}.chat-header{min-height:72px;padding-inline:var(--space-3);gap:var(--space-3)}.header-main h1{font-size:1.08rem}.nickname{max-width:42vw;font-size:.84rem}.header-meta{gap:6px;font-size:.78rem}.online-pill,.status{min-height:32px;padding-inline:9px}.clear-button{min-height:36px;padding-inline:10px}.clear-countdown{padding-inline:var(--space-3);font-size:.86rem}.message-list{padding:var(--space-3)}.message-row{margin-block:5px}.message-bubble{max-width:86%;padding:10px var(--space-3)}.message-bubble p{font-size:.96rem}.system-message{align-items:flex-start;border-radius:var(--radius-sm);font-size:.78rem}.sender{max-width:128px}.composer{padding-inline:var(--space-3)}.emoji-popover{left:var(--space-3);right:var(--space-3);max-height:min(330px,48vh)}.emoji-popover em-emoji-picker{height:min(320px,46vh)}.composer textarea{min-height:40px}.image-message-button{width:min(300px,72vw)}.image-preview-backdrop{padding:12px}.image-preview-full{max-width:calc(100vw - 24px);max-height:calc(88vh - 60px)}}@media(max-width:420px){.chat-header{align-items:flex-start;flex-direction:column;min-height:118px}.header-meta{width:100%;gap:var(--space-2);justify-content:space-between}.nickname{max-width:88vw}.online-pill,.status{min-height:32px;padding-inline:8px}.message-bubble{max-width:91%}}