:root{--bg: #f5f6f8;--bg-elev: #ffffff;--bg-soft: #ebecee;--border: #e2e2e5;--text: #1f1f1f;--text-dim: #6a6a6a;--accent: #ff6b4a;--accent-dim: #cc5538;--accent-rgb: 255, 107, 74;--accent-glow: rgba(var(--accent-rgb), .15);--accent-glow-strong: rgba(var(--accent-rgb), .3);--link: #4a9eff;--link-rgb: 74, 158, 255;--warn: #e05555;--warn-bg: rgba(224, 85, 85, .1);--msg-me-bg: rgba(var(--accent-rgb), .08);--msg-me-border: rgba(var(--accent-rgb), .12);--overlay: rgba(0, 0, 0, .4);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);--shadow-md: 0 2px 8px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 28px rgba(0, 0, 0, .18);--state-hover: rgba(var(--accent-rgb), .08);--state-press: rgba(var(--accent-rgb), .14);--mono: "JetBrains Mono", "Fira Code", "Cascadia Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;--sai-top: var(--safe-area-inset-top, env(safe-area-inset-top, 0px));--sai-right: var(--safe-area-inset-right, env(safe-area-inset-right, 0px));--sai-bottom: var(--safe-area-inset-bottom, env(safe-area-inset-bottom, 0px));--sai-left: var(--safe-area-inset-left, env(safe-area-inset-left, 0px))}[data-theme=dark],.dark{--bg: #17171a;--bg-elev: #202024;--bg-soft: #29292e;--border: #38383e;--text: #e8e8e8;--text-dim: #8a8a8a;--accent: #ff6b4a;--accent-dim: #cc5538;--accent-rgb: 255, 107, 74;--accent-glow: rgba(var(--accent-rgb), .15);--accent-glow-strong: rgba(var(--accent-rgb), .3);--link: #5ab0ff;--link-rgb: 90, 176, 255;--warn: #e05555;--warn-bg: rgba(224, 85, 85, .12);--msg-me-bg: rgba(var(--accent-rgb), .1);--msg-me-border: rgba(var(--accent-rgb), .2);--overlay: rgba(0, 0, 0, .6);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .2);--shadow-md: 0 2px 8px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 28px rgba(0, 0, 0, .5);--state-hover: rgba(var(--accent-rgb), .12);--state-press: rgba(var(--accent-rgb), .2)}*{box-sizing:border-box}*{-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}input,textarea,[contenteditable]{-webkit-touch-callout:default;-webkit-user-select:text;user-select:text}[hidden]{display:none!important}html,body,#root{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:var(--mono);font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased;overscroll-behavior:none}.board{position:relative;display:flex;flex-direction:column;height:100dvh;max-width:920px;margin:0 auto;border-left:1px solid var(--border);border-right:1px solid var(--border);background:var(--bg);box-shadow:var(--shadow-sm);padding-top:var(--sai-top)}.board__header{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--bg-elev);position:sticky;top:var(--sai-top);z-index:5}.board__left{display:flex;align-items:center;gap:8px;min-width:0}.board__title{font-weight:700;letter-spacing:.5px;color:var(--accent);animation:fade-in .25s ease-out;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;-webkit-user-select:none;user-select:none}.board__slash{color:var(--text-dim)}.board__sub{margin-left:8px;color:var(--text-dim);font-weight:400;font-size:12px}.board__meta{display:flex;align-items:center;gap:10px;font-size:12px}.board__lock{margin-left:8px;font-size:14px}.status{display:inline-flex;align-items:center;gap:6px;padding:2px 8px;border:1px solid var(--border);background:var(--bg-soft);color:var(--text-dim);text-transform:lowercase;border-radius:6px}.status:before{content:"";width:6px;height:6px;background:var(--text-dim);display:inline-block;border-radius:50%}.status--on{color:var(--accent);border-color:var(--accent-dim)}.status--on:before{background:var(--accent)}.status--off{color:var(--warn);border-color:var(--warn)}.status--off:before{background:var(--warn)}.nick-edit{display:inline-flex;gap:6px;align-items:center}.nick-edit__input{background:var(--bg);color:var(--accent);border:1px solid var(--accent-dim);padding:2px 8px;font-family:inherit;font-size:inherit;width:160px;outline:none;border-radius:6px}.nick-edit__input:focus{border-color:var(--accent)}.nick-edit__btn{background:var(--bg);color:var(--accent);border:1px solid var(--accent-dim);padding:2px 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rgba(var(--accent-rgb),.12)}to{box-shadow:0 0 0 0 transparent,0 0 0 0 transparent}}.msg--pressed:after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;box-shadow:0 0 12px 6px var(--accent-glow-strong),0 0 36px 12px rgba(var(--accent-rgb),.12)}.msg__more{position:absolute;top:2px;right:3px;width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;padding:0;border:none;background:transparent;color:var(--text-dim);opacity:0;cursor:pointer;transition:opacity .15s;-webkit-tap-highlight-color:transparent}@media(hover:hover){.msg:hover .msg__more{opacity:.55}.msg__more:hover{opacity:1}}.msg__more:focus-visible{opacity:1}.msg--pending{opacity:.65}.msg__read-wrap{display:inline-flex;align-items:center;gap:2px}.msg__read-count{font-size:10px;color:var(--text-dim)}.msg__edited{font-size:10px}.msg__file-name{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:220px}.msg__file-size{flex:0 0 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