*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-base: #212121;--bg-surface: #181818;--bg-elevated: #2a2a2a;--bg-hover: rgba(255,255,255,.05);--bg-active: rgba(74,222,128,.09);--bg-input: #1a1a1a;--accent: #4ade80;--accent-dim: rgba(74,222,128,.13);--accent-hover: #22c55e;--accent-text: #071a0e;--msg-out-bg: #4ade80;--msg-out-text: #071a0e;--msg-in-bg: #2a2a2a;--text-primary: #ffffff;--text-secondary: #aaaaaa;--text-muted: #606060;--border: rgba(255,255,255,.06);--border-strong: rgba(255,255,255,.1);--border-accent: rgba(74,222,128,.35);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 14px;--radius-xl: 20px;--radius-full: 999px;--sidebar-w: 360px;--header-h: 56px;--font-sans: "DM Sans", system-ui, sans-serif;--font-mono: "JetBrains Mono", monospace;--shadow-md: 0 4px 20px rgba(0,0,0,.6);--shadow-lg: 0 8px 40px rgba(0,0,0,.8);--ease-spring: cubic-bezier(.34,1.56,.64,1);--ease-smooth: cubic-bezier(.4,0,.2,1);--ease-out: 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span{font-size:12px;color:var(--text-secondary)}.existing-reaction.my-reaction{background:var(--accent-dim);border-color:var(--border-accent)}.reaction-add-btn{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;background:transparent;border:1px dashed var(--border);border-radius:var(--radius-full);font-size:14px;color:var(--text-muted);cursor:pointer;transition:all .15s;padding:0}.reaction-add-btn:hover{border-color:var(--border-accent);color:var(--accent)}.reaction-add-btn.floating{display:none;position:absolute;right:-34px;top:50%;transform:translateY(-50%);background:var(--bg-elevated);border-style:solid}.msg-row:hover .reaction-add-btn.floating{display:flex}.msg-reply-ref{display:flex;flex-direction:column;gap:1px;padding:5px 10px;background:#00000026;border-left:3px solid var(--accent);border-radius:6px 6px 0 0;margin-bottom:5px}.reply-name-ref{font-size:11px;color:var(--accent);font-weight:600}.reply-content-ref{font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.msg-row.me .reply-name-ref{color:#071a0ecc}.msg-row.me .reply-content-ref{color:#071a0e8c}.chat-input-area{border-top:1px solid var(--border);background:var(--bg-surface);flex-shrink:0}.chat-input-row{display:flex;align-items:flex-end;gap:6px;padding:8px 10px}.chat-input-actions{display:flex;gap:1px;padding-bottom:2px}.input-box-wrap{flex:1;background:var(--bg-input);border:1px solid var(--border);border-radius:22px;transition:border-color .15s;overflow:hidden}.input-box-wrap:focus-within{border-color:var(--border-accent)}.chat-textarea{width:100%;padding:10px 16px;background:transparent;border:none;color:var(--text-primary);font-family:var(--font-sans);font-size:15px;resize:none;outline:none;line-height:1.45;max-height:120px;overflow-y:auto;display:block}.chat-textarea::placeholder{color:var(--text-muted)}.send-btn{color:var(--accent)!important;width:40px!important;height:40px!important;border-radius:50%!important}.send-btn:hover{background:var(--accent-dim)!important}.send-btn svg{width:20px!important;height:20px!important}.sticker-picker-panel{max-height:200px;overflow-y:auto;border-top:1px solid var(--border);background:var(--bg-elevated)}@media (max-width: 700px){.sidebar{position:fixed;left:0;top:0;bottom:0;z-index:100;transform:translate(0);transition:transform .28s var(--ease-smooth);width:100vw;min-width:0}.sidebar.hidden{transform:translate(-100%)}.chat-area{width:100vw}.back-btn{display:flex!important}}