:root{--bg-color: #0f172a;--card-bg: #1e293b;--text-main: #f8fafc;--text-muted: #94a3b8;--primary: #3b82f6;--primary-hover: #2563eb;--success: #10b981;--danger: #ef4444;--border: #334155;--radius: 12px}*,*:before,*:after{box-sizing:border-box}html,body,#root{min-height:100vh}body{margin:0;padding:20px;background-color:var(--bg-color);color:var(--text-main);font-family:system-ui,-apple-system,sans-serif}button,input{font:inherit}#root,.app-container{width:100%}.app-container{max-width:1100px;margin:0 auto}.login-screen{display:flex;align-items:center;justify-content:center;min-height:100vh}header{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}.header-actions{display:flex;gap:10px;align-items:center}.brand-title{margin:0;font-size:1.5rem}.brand-title-centered{text-align:center}.uid-badge{display:inline-flex;align-items:center;gap:6px;background:var(--card-bg);border:1px solid 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