:root{--font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;font-family:var(--font-base);font-weight:400;color:#1a1a1a;background-color:#fff;--base-size-2: .125rem;--base-size-4: .25rem;--base-size-6: .375rem;--base-size-8: .5rem;--base-size-12: .75rem;--base-size-14: .875rem;--base-size-16: 1rem;--base-size-20: 1.25rem;--base-size-24: 1.5rem;--base-size-28: 1.75rem;--base-size-32: 2rem;--base-size-36: 2.25rem;--base-size-40: 2.5rem;--base-size-44: 2.75rem;--base-size-48: 3rem;--base-size-64: 4rem;--base-size-80: 5rem;--base-size-96: 6rem;--base-size-112: 7rem;--base-size-128: 8rem;--color-bg: #ffffff;--color-bg-subtle: #fafafa;--color-border: #e2e5e8;--color-border-card: #d1d9e0;--color-border-strong: #d0d7de;--color-text: #1a1a1a;--color-muted: #545967;--header-height: 52px;--header-gap: 12px;--header-divider: rgba(15, 23, 42, .2);--color-primary: #1f5fa9;--color-primary-light: #4c82c0;--color-primary-dark: #124579;--color-secondary: #f4c64b;--color-secondary-light: #f9d979;--color-secondary-dark: #c79f37;--color-accent: #e45d33;--color-accent-light: #f28963;--color-accent-dark: #b34122;--info-bg: #d8f3dc;--info-border: #b8e2c7;--info-text: #1a7f3c;--info-subtle: rgba(0, 0, 0, .55);--btn-accent-bg: #7fc5b7;--btn-accent-bg-hover: #67b3a5;--btn-accent-bg-active: #a0d9cf;--btn-accent-bg-subtle: #dfeaef;--btn-accent-text: #fff;--btn-accent-border: #8dd0c3;--link: var(--color-primary);--link-hover: var(--color-primary-dark);--radius-lg: 6px;--radius-sm: 4px;--radius-cx: 10px;--page-bg: var(--color-bg);--panel-bg: var(--color-bg);--border-subtle: var(--color-border);--border-strong: var(--color-border-strong);--border: var(--color-border);--border-card: var(--color-border-card);--text-primary: var(--color-text);--text-muted: var(--color-muted);--text-main: var(--color-text);--accent: var(--color-primary);--accent-strong: var(--color-primary-dark);--accent-hover: var(--color-primary-dark);--danger: 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8px);height:100%;position:relative}.app-header-left,.app-header-right{display:flex;align-items:center;gap:12px}.app-header-search{flex:1 1 auto;min-width:0;display:flex;justify-content:flex-end;position:relative;margin-right:0}.app-header-left{flex:0 0 auto}.app-header-right{flex:0 0 auto;margin-left:auto;justify-content:flex-end}.header-search{display:flex;align-items:center;position:relative;justify-content:flex-end;height:34px;min-width:34px}.header-search--desktop{flex:1 1 100%;min-width:260px;max-width:420px}.header-search--compact,.header-search--mobile{width:34px;flex:0 0 auto}.header-search--mobile .header-search-content{position:absolute;inset:0}.header-search-input-wrap,.header-search-input{min-width:0}.app-header.is-search-overlay .app-header-left,.app-header.is-search-overlay .app-header-right{opacity:0;pointer-events:none}.app-header.is-search-overlay .app-header-search{position:absolute;inset:0;flex:0 0 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12px;font-size:var(--base-size-14);color:var(--text-primary);height:100%;line-height:1.2}.header-search-input::placeholder{color:var(--text-muted)}.header-search-input:focus{outline:none}.header-search-clear{position:absolute;right:6px;width:20px;height:20px;border-radius:50%;border:none;background:#0f172a33;color:#fff;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;font-size:.75rem;line-height:1}.header-search-clear:hover{background:#0f172a59}.header-search-close{border:none;background:transparent;color:var(--text-primary);font-weight:500;margin-left:12px;cursor:pointer}.app-header-menu-btn{position:relative;border-radius:var(--radius-lg);border:1px solid var(--border);background:#f6f7f9;transition:background .2s ease,border-color .2s ease}.app-header-menu-btn.btn-icon{width:var(--header-control-size);min-width:var(--header-control-size);height:34px}.app-header-menu-btn img{width:16px;height:16px;display:block}.btn.app-header-menu-btn{display:none}@media(max-width:899px){.btn.app-header-menu-btn{display:inline-flex}.app-header-right,.header-icons{gap:6px}.header-profile-btn{display:inline-flex;min-width:48px;width:48px;height:34px;padding:0;justify-content:center;gap:0}.header-profile-btn 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ease}.header-channel-add:hover{background:#0f172a0f}.header-icons{display:flex;align-items:center;gap:8px;position:relative}.header-icon-btn{position:relative}.header-channel-chip{border:1px solid var(--border);border-radius:var(--radius-lg);background:#f6f8fa;color:var(--text-primary);font:inherit;padding:0;font-size:var(--base-size-14);height:34px;display:inline-flex;align-items:center;gap:4px;cursor:pointer;transition:background .2s ease,border-color .2s ease;width:var(--header-control-size);min-width:var(--header-control-size);flex-shrink:0;justify-content:center;white-space:nowrap}.header-channel-chip-icon{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px}.header-channel-chip:hover{background:#0f172a0f}.header-channel-chip.is-active{gap:6px;width:auto;min-width:var(--header-control-size);padding:0 10px;justify-content:center;background:#1f5fa91f;border-color:var(--color-primary);color:#1f5fa9}.header-channel-chip-icon 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var(--border);display:inline-flex;align-items:center;justify-content:center}.header-profile-avatar-img{width:100%;height:100%;object-fit:cover}.header-profile-name{font-weight:600;max-width:120px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.header-profile-caret{font-size:12px;color:var(--text-muted)}.header-notify-dot{position:absolute;right:-6px;top:-6px;display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:50%;background:var(--color-primary);color:#fff;font-size:11px;font-weight:700}.topbar{background:#f6f7f9;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:30}.topbar-inner{max-width:1050px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:8px}.topbar-left{display:flex;align-items:center;gap:12px}.topbar-menu-btn{display:none;align-items:center;justify-content:center;width:34px;height:34px;padding:4px;border-radius:var(--radius-lg);border:1px solid transparent;background:#0f172a0a;cursor:pointer}.topbar-menu-btn:hover{background:#0f172a14}.topbar-menu-btn img{width:20px;height:20px;object-fit:contain}.topbar-avatar-btn{display:none;align-items:center;justify-content:center;width:36px;height:36px;border-radius:999px;border:1px solid var(--border);background:#f3f4f6;color:var(--text-primary);font-weight:700;cursor:pointer}.topbar-avatar-btn:hover{background:#0f172a14}.topbar-avatar-initial{font-size:14px}.topbar-user-label{display:none}@media(max-width:900px){.topbar-menu-btn,.topbar-avatar-btn{display:inline-flex}.topbar-user-label{display:inline-flex;align-items:center;font-weight:600;font-size:var(--base-size-14);color:var(--text-primary)}.topbar-user-btn.topbar-user-btn-mobile,.topbar-avatar-inline{display:inline-flex}}.topbar-logo{width:28px;height:28px;object-fit:contain;transform:scale(1.15);transform-origin:left center}.topbar-title{font-weight:600;font-size:var(--base-size-16);letter-spacing:.01em}.topbar-brand{position:relative;display:inline-flex;align-items:center}.topbar-right{display:flex;align-items:center;gap:8px;position:relative}.mobile-menu-drawer{position:fixed;top:0;right:0;left:auto;width:72vw;max-width:280px;height:100vh;background:#fff;box-shadow:-4px 0 20px #0000001f;z-index:60;padding:16px;display:flex;flex-direction:column;gap:12px}.mobile-menu-backdrop{position:fixed;inset:0;background:#0f172a59;z-index:50}.mobile-menu-header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px}.mobile-menu-close{background:none;border:none;font-size:20px;cursor:pointer}.mobile-menu-title{font-weight:700;font-size:var(--base-size-16)}.mobile-menu-section{border-top:1px solid var(--border);padding-top:8px}.mobile-menu-section:first-of-type{border-top:none;padding-top:16px}.mobile-menu-profile{display:flex;align-items:center;gap:12px;padding:12px;background:#0f172a0a;border-radius:var(--radius-lg);margin-bottom:8px}.mobile-menu-profile-avatar{width:48px;height:48px;border-radius:50%;overflow:hidden;background:#f3f4f6;flex-shrink:0;display:flex;align-items:center;justify-content:center}.mobile-menu-profile-avatar-img{width:100%;height:100%;object-fit:cover}.mobile-menu-profile-info{flex:1;min-width:0}.mobile-menu-profile-name{font-weight:600;font-size:var(--base-size-14);color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mobile-menu-profile-badge{display:inline-block;margin-top:4px;padding:2px 8px;background:#f4c64b33;color:#b8860b;font-size:11px;font-weight:600;border-radius:4px;text-transform:uppercase;letter-spacing:.5px}.mobile-menu-list{list-style:none;padding:0;margin:8px 0 0;display:grid;gap:6px}.mobile-menu-item{width:100%}.mobile-menu-item button{width:100%;text-align:left}.topbar-user{font-weight:600;font-size:var(--base-size-16);color:var(--text-primary)}.topbar-user-btn{border:1px solid transparent;background:#0f172a0a;padding:6px 10px;border-radius:var(--radius-lg);display:none;align-items:center;gap:6px;font:inherit;cursor:pointer;color:var(--text-primary)}.topbar-user-btn:hover{background:#0f172a14}.topbar-user-btn.is-premium{border-color:var(--color-secondary);background:#f4c64b2e}.topbar-user-caret{font-size:12px;color:var(--text-muted)}.topbar-avatar-inline{display:none;width:28px;height:28px;border-radius:999px;border:1px solid var(--border);background:#f3f4f6;overflow:hidden;object-fit:cover;position:relative}.topbar-avatar-inline-img{width:100%;height:100%;object-fit:cover}.topbar-display{position:relative;display:inline-flex;align-items:center;min-height:20px}.topbar-notify-dot.topbar-notify-dot-text{top:-8px;right:-12px}.sidebar-profile-name .topbar-notify-dot-text{top:-6px;right:-10px}.topbar-notify-dot{position:absolute;top:-4px;right:-4px;min-width:16px;height:16px;padding:0 5px;border-radius:999px;background:var(--color-primary);color:#fff;font-size:11px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 0 0 2px #fff}@media(max-width:720px){.topbar-user-btn.topbar-user-btn-mobile,.topbar-avatar-inline{display:inline-flex}}.topbar-logout{border-color:transparent;background:transparent}.topbar-logout:hover:not(:disabled){background:#0f172a0f}.channel-actions-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:space-between;margin-top:4px;padding:6px 0}.channels-search{border:1px solid var(--border);border-radius:var(--radius-lg);padding:6px 10px;display:inline-flex;align-items:center;gap:8px;min-width:0;flex:1;max-width:360px;background:#fff}.channels-search-input{border:none;outline:none;flex:1;font:inherit;padding:0;background:transparent}.channels-search-icon{color:var(--text-muted)}.channels-search-clear{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:2px;display:inline-flex;align-items:center;justify-content:center}.channel-list{list-style:none;padding:0;margin:12px 0 0;color:inherit;max-height:min(600px,80vh);min-height:240px;overflow-y:auto}.channel-item+.channel-item{border-top:1px solid var(--border)}.channel-item:last-child{border-bottom:1px solid var(--border)}.channel-line{display:flex;align-items:center;gap:12px;padding:10px 4px;border-radius:var(--radius-lg);transition:background-color .15s ease,box-shadow .15s ease;position:relative}.channel-item.is-active .channel-line{background:#1f5fa914;box-shadow:inset 0 0 0 1px #1f5fa940}.channel-item:hover .channel-line{background:#0f172a08}.channel-item--inactive .channel-line{opacity:.65}.channel-avatar{width:36px;height:36px;border-radius:var(--radius-lg);background:var(--color-bg-subtle);border:1px solid var(--border);display:inline-flex;align-items:center;justify-content:center;font-weight:700;color:var(--color-primary);flex-shrink:0}.channel-avatar img{width:100%;height:100%;object-fit:cover;border-radius:inherit;display:block}.channel-item__badge-disabled{margin-left:auto;font-size:11px;padding:2px 6px;border-radius:999px;background:#f4f4f6;color:#888;border:1px solid var(--border)}.channel-title-btn{display:flex;flex-direction:column;gap:4px;padding:0;margin:0;border:none;background:transparent;color:inherit;font:inherit;line-height:1.35;cursor:pointer;flex:1;min-width:0;text-align:left}.channel-title-btn:disabled{cursor:not-allowed}.channel-title{font-weight:700;font-size:var(--base-size-14);line-height:1.3;max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.channel-username{font-size:var(--base-size-12);color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.channel-menu-toggle{margin-left:auto;background:transparent;border:none;padding:6px;cursor:pointer;color:var(--text-muted);border-radius:var(--radius-sm);display:inline-flex;align-items:center;justify-content:center}.channel-menu-toggle:hover{color:var(--text-primary);background:#0f172a0a}.channel-empty-state{margin:20px 0;padding:20px;text-align:center;border:1px dashed var(--border);border-radius:var(--radius-lg);color:var(--text-muted);display:grid;gap:10px;justify-items:center}.feed-shell{background:transparent;border:none;border-radius:0;padding:0}.feed-archive-info{margin-bottom:12px}.feed-empty-state-row{display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap}.feed-toolbar{display:flex;align-items:center;gap:10px;padding:0;margin-bottom:8px;background:transparent;border:none;flex-wrap:wrap}.feed-toolbar-title{font-weight:600;font-size:var(--base-size-16);margin-right:auto}.feed-filter-btn{position:relative}.feed-toolbar-left,.feed-toolbar-right{display:flex;align-items:center;gap:8px}.feed-toolbar-left{flex:0 0 auto}.feed-toolbar-right{margin-left:auto;flex:0 0 auto}.feed-toolbar-search{display:flex;align-items:center;gap:6px}.toolbar-search{display:flex;align-items:center;gap:6px;margin:0}.toolbar-search-toggle{width:32px;height:32px;border-radius:var(--radius-cx);border:1px solid 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