:root{--primary:#4f46e5;--primary-dark:#3730a3;--primary-light:#818cf8;--secondary:#06b6d4;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;--dark:#1e293b;--dark-secondary:#334155;--gray-50:#f8fafc;--gray-100:#f1f5f9;--gray-200:#e2e8f0;--gray-300:#cbd5e1;--gray-400:#94a3b8;--gray-500:#64748b;--gray-600:#475569;--gray-700:#334155;--gray-800:#1e293b;--gray-900:#0f172a;--sidebar-width:260px;--sidebar-collapsed:70px;--topbar-height:64px;--border-radius:12px;--border-radius-sm:8px;--shadow:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--shadow-xl:0 20px 25px -5px #0000001a, 0 10px 10px -5px #0000000a;--transition:all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--gray-100);color:var(--gray-800);font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;font-size:14px;line-height:1.6}.hidden{display:none!important}.login-screen{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login-container{width:100%;max-width:420px;box-shadow:var(--shadow-xl);background:#fff;border-radius:20px;padding:48px 40px}.login-logo{text-align:center;margin-bottom:36px}.login-logo i{color:var(--primary);margin-bottom:12px;font-size:48px;display:block}.login-logo h1{color:var(--gray-800);letter-spacing:-.5px;font-size:28px;font-weight:800}.login-logo p{color:var(--gray-500);margin-top:4px;font-size:14px}.login-form .form-group{margin-bottom:20px}.login-form label{color:var(--gray-700);margin-bottom:8px;font-size:13px;font-weight:600;display:block}.login-form input{border:2px solid 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