:root{--brand-primary:#4f46e5;--brand-secondary:#7c3aed;--brand-accent:#06b6d4;--brand-gradient:linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);--brand-gradient-glow:linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);--bg-base:#0f0f17;--bg-surface:#16161f;--bg-elevated:#1e1e2e;--bg-hover:#252535;--bg-active:#2d2d45;--bg-glass:rgba(30,30,46,.7);--text-primary:#f0f0ff;--text-secondary:#9899b5;--text-muted:#5a5b72;--text-accent:#06b6d4;--text-link:#818cf8;--border-subtle:rgba(99,102,241,.12);--border-default:rgba(99,102,241,.2);--border-focus:rgba(99,102,241,.6);--msg-out-bg:linear-gradient(135deg, #4f46e5, #7c3aed);--msg-in-bg:#1e1e2e;--msg-out-text:#fff;--msg-in-text:#f0f0ff;--sidebar-width:320px;--shadow-sm:0 2px 8px rgba(0,0,0,.3);--shadow-md:0 8px 24px rgba(0,0,0,.4);--shadow-lg:0 16px 48px rgba(0,0,0,.5);--shadow-glow:0 0 24px rgba(79,70,229,.3);--shadow-glow-accent:0 0 20px rgba(6,182,212,.25);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-pill:999px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--font-base:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-size-xs:11px;--font-size-sm:13px;--font-size-md:15px;--font-size-lg:17px;--font-size-xl:20px;--font-size-2xl:24px;--transition-fast:.15s ease;--transition-base:.25s ease;--transition-slow:.4s ease;--status-online:#22c55e;--status-away:#f59e0b;--status-dnd:#ef4444;--status-invisible:#6b7280;--z-sidebar:10;--z-modal:100;--z-toast:200;--z-tooltip:300}[data-theme=light]{--bg-base:#f0f0f8;--bg-surface:#fff;--bg-elevated:#f8f8ff;--bg-hover:#ededf8;--bg-active:#e2e2f5;--bg-glass:rgba(255,255,255,.85);--text-primary:#1a1a2e;--text-secondary:#4a4a6a;--text-muted:#8a8aa8;--border-subtle:rgba(99,102,241,.1);--border-default:rgba(99,102,241,.2);--msg-in-bg:#ededf8;--msg-in-text:#1a1a2e;--shadow-sm:0 2px 8px 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