:root{--bg:#f5f5f5;--surface:#fff;--text:#1a1a1a;--text-secondary:#444;--text-muted:#888;--text-faint:#999;--border:#ddd;--border-subtle:#d1d5db;--border-section:#e5e7eb;--primary:#4f46e5;--shadow:#00000014;--error:#e55353;--error-border:#fca5a5;--error-bg:#fef2f2;--success:#16a34a;--success-border:#86efac;--success-bg:#f0fdf4}[data-theme=dark]{--bg:#111827;--surface:#1f2937;--text:#f9fafb;--text-secondary:#d1d5db;--text-muted:#9ca3af;--text-faint:#6b7280;--border:#374151;--border-subtle:#374151;--border-section:#374151;--primary:#818cf8;--shadow:#0000004d;--error:#f87171;--error-border:#7f1d1d;--error-bg:#1c0a0a;--success:#4ade80;--success-border:#14532d;--success-bg:#052e16}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;transition:background-color .2s,color .2s}#root{max-width:800px;margin:0 auto;padding:24px 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textarea:focus{border-color:var(--primary)}.post-form__counter{color:var(--text-faint);align-self:flex-end;margin-top:4px;font-size:.8rem}.post-form__counter--warn{color:var(--error)}.post-form__field-hint{color:var(--text-muted);margin-top:4px;font-size:.8rem}.post-form__field-error{color:var(--error);margin-top:4px;font-size:.8rem}.post-form__checkbox-row{cursor:pointer;align-items:center;gap:8px;margin-bottom:16px;display:flex}.post-form__checkbox-row input[type=checkbox]{width:16px;height:16px;accent-color:var(--primary);cursor:pointer;flex-shrink:0}.post-form__checkbox-row label{color:var(--text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none;font-size:.9rem}.post-form__field--duration 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0;border:none;align-items:center;gap:6px;margin-bottom:16px;padding:0;font-family:inherit;font-size:1rem;font-weight:600;display:flex}.feed__collapsible-header:hover{color:var(--text)}.feed__chevron{opacity:.6;font-size:.65rem}.feed__state{color:var(--text-muted);padding:24px 0;font-size:.95rem}.feed__state--error{color:var(--error)}.feed--archived{border-top:1px solid var(--border-section);opacity:.75;margin-top:48px;padding-top:32px}.post-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;display:grid}.post-card{background:var(--surface);box-shadow:0 1px 4px var(--shadow);border-radius:12px;flex-direction:column;gap:16px;padding:20px;transition:background-color .2s;display:flex}.post-card__content{color:var(--text);white-space:pre-wrap;word-break:break-word;font-size:.975rem;line-height:1.65}.post-card__footer{justify-content:space-between;align-items:center;margin-top:auto;display:flex}.post-card__meta{color:var(--text-faint);font-size:.8rem}.post-card__upvote-btn{border:1px solid var(--border-subtle);color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:6px;align-items:center;gap:5px;padding:4px 10px;font-family:inherit;font-size:.875rem;font-weight:600;transition:border-color .15s,color .15s;display:flex}.post-card__upvote-btn:not(:disabled):hover{border-color:var(--primary);color:var(--primary)}.post-card__upvote-btn--voted{border-color:var(--primary);color:var(--primary);cursor:default}.post-card__upvote-btn:disabled{opacity:1}.post-card__selected-badge{color:#b45309;background:#eab30826;border-radius:999px;align-self:flex-start;align-items:center;padding:3px 10px;font-size:.75rem;font-weight:600;display:inline-flex}[data-theme=dark] .post-card__selected-badge{color:#fbbf24;background:#eab3081a}.post-card__presenter-badge{color:var(--primary);background:#4f46e51a;border-radius:999px;align-self:flex-start;align-items:center;padding:3px 10px;font-size:.75rem;font-weight:500;display:inline-flex}.post-card__action-error{color:var(--error);font-size:.8rem}.post-card__actions{align-items:center;gap:8px;display:flex}.feed--selected{border-bottom:1px solid var(--border-section);margin-bottom:40px;padding-bottom:32px}.post-card__icon-btn{border:1px solid var(--border-subtle);cursor:pointer;background:0 0;border-radius:6px;justify-content:center;align-items:center;width:30px;height:30px;padding:0;font-size:15px;line-height:1;transition:background .15s,border-color .15s;display:flex}.post-card__icon-btn:disabled{opacity:.5;cursor:not-allowed}.post-card__icon-btn--select:not(:disabled):hover{background:#eab3081f;border-color:#fcd34d}.post-card__icon-btn--unselect:not(:disabled):hover{border-color:var(--primary);background:#6366f11a}.post-card__icon-btn--archive:not(:disabled):hover{background:var(--success-bg);border-color:var(--success-border)}.post-card__icon-btn--delete:not(:disabled):hover{background:var(--error-bg);border-color:var(--error-border)}.post-card__toggle{color:var(--primary);cursor:pointer;background:0 0;border:none;align-self:flex-start;padding:0;font-family:inherit;font-size:.85rem}.post-card__toggle:hover{text-decoration:underline}.announcement-banner{color:#92400e;background:#fef9ec;border:1px solid #fde68a;border-radius:10px;margin-bottom:28px;padding:12px 16px;font-size:.925rem;line-height:1.6}[data-theme=dark] 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