:root {
      --primary: #004A87;
      --primary-light: #250188;
      --secondary: #004A87;
      --secondary-light: #E6C35C;
      --dark: #1A1A1A;
      --light: #F8F9FA;
      --gray: #6C757D;
      --success: #28a745;
    }
    
    body {
      background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ed 100%);
      min-height: 100vh;
      font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }
    
    .login-container {
      max-width: 1200px;
      width: 100%;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
      background: white;
      display: flex;
      min-height: 700px;
    }
    
    .login-left {
      flex: 1;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      padding: 60px 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      color: white;
      position: relative;
      overflow: hidden;
    }

  
    
    .login-left::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none" opacity="0.1"><path d="M0,0 L100,0 L100,100 Z" fill="white"/></svg>');
      background-size: cover;
    }
    
    .login-right {
      flex: 1;
      padding: 60px 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    
    .logo-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 60px;
      padding: 0 10px;
      position: relative;
      z-index: 2;
    }
    
    .logo-placeholder {
      width: 180px;
      height: 90px;
      background: rgba(255, 255, 255, 0.95);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    
    .logo-placeholder:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }
    
    .logo-placeholder img {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
    }
    
    .system-title {
      text-align: center;
      margin-bottom: 50px;
    }
    
    .system-title h1 {
      color: var(--dark);
      font-weight: 700;
      font-size: 2.2rem;
      margin-bottom: 8px;
      letter-spacing: 0.5px;
    }
    
    .system-title .subtitle {
      color: var(--gray);
      font-size: 1.1rem;
      font-weight: 400;
    }
    
    .login-form {
      max-width: 400px;
      margin: 0 auto;
      width: 100%;
    }
    
    .form-control {
      border: 2px solid #e9ecef;
      border-radius: 12px;
      padding: 14px 18px;
      font-size: 1rem;
      transition: all 0.3s ease;
      background: #fff;
    }
    
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(71, 38, 125, 0.1);
    }
    
    .btn-login {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      border: none;
      border-radius: 12px;
      padding: 16px;
      font-size: 1.1rem;
      font-weight: 600;
      color: white;
      transition: all 0.3s ease;
      letter-spacing: 0.5px;
    }
    
    .btn-login:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(71, 38, 125, 0.2);
      background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    }
    
    .error-alert {
      border-radius: 12px;
      border-left: 5px solid #dc3545;
      animation: slideIn 0.3s ease;
    }
    
    @keyframes slideIn {
      from {
        opacity: 0;
        transform: translateY(-10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    .feature-list {
      list-style: none;
      padding: 0;
      margin-top: 40px;
      position: relative;
      z-index: 2;
    }
    
    .feature-list li {
      padding: 12px 0;
      color: rgba(255, 255, 255, 0.95);
      font-size: 1.05rem;
      display: flex;
      align-items: center;
    }
    
    .feature-list li::before {
      content: "✓";
      color: var(--secondary);
      font-weight: bold;
      margin-right: 12px;
      font-size: 1.2rem;
    }
    
    .welcome-title {
      font-size: 2.5rem;
      font-weight: 800;
      margin-bottom: 20px;
      line-height: 1.2;
      position: relative;
      z-index: 2;
    }
    
    .welcome-subtitle {
      font-size: 1.1rem;
      opacity: 0.95;
      margin-bottom: 40px;
      line-height: 1.6;
      position: relative;
      z-index: 2;
    }
    
    .copyright {
      margin-top: 40px;
      text-align: center;
      color: rgba(255, 255, 255, 0.8);
      font-size: 0.9rem;
      position: relative;
      z-index: 2;
    }
    
    .form-label {
      font-weight: 600;
      color: var(--dark);
      margin-bottom: 8px;
    }
    
    .accent-line {
      height: 4px;
      width: 60px;
      background: var(--secondary);
      border-radius: 2px;
      margin: 20px auto;
    }
    
    .form-group {
      margin-bottom: 24px;
    }
    
    .logo-left {
      width: 180px;
      height: 90px;
    }
    
    .logo-right {
      width: 180px;
      height: 90px;
    }
    
    @media (max-width: 992px) {
      .login-container {
        flex-direction: column;
        min-height: auto;
      }
      
      .login-left, .login-right {
        padding: 40px 20px;
      }
      
      .logo-header {
        margin-bottom: 30px;
        flex-direction: column;
        gap: 20px;
      }
      
      .logo-placeholder {
        width: 160px;
        height: 80px;
      }
      
      .logo-left, .logo-right {
        width: 160px;
        height: 80px;
      }
      
      .welcome-title {
        font-size: 2rem;
      }
    }
    
    @media (max-width: 576px) {
      .login-left, .login-right {
        padding: 30px 15px;
      }
      
      .logo-placeholder {
        width: 140px;
        height: 70px;
      }
      
      .logo-left, .logo-right {
        width: 140px;
        height: 70px;
      }
      
      .welcome-title {
        font-size: 1.8rem;
      }
      
      .feature-list li {
        font-size: 1rem;
      }
    }