* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .login-container {
            max-width: 450px;
            width: 100%;
            background: white;
            border-radius: 24px;
            box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
            overflow: hidden;
        }
        
        .login-header {
            background: linear-gradient(135deg, #667eea, #764ba2);
            padding: 40px 30px;
            text-align: center;
            color: white;
        }
        
        .login-header h1 {
            font-size: 1.8em;
            margin-bottom: 10px;
        }
        
        .login-header p {
            opacity: 0.9;
            font-size: 0.9em;
        }
        
        .login-form {
            padding: 40px 30px;
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #1e293b;
        }
        
        .form-group input {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 1em;
            transition: all 0.2s;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: #4f46e5;
            box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
        }
        
        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 25px;
        }
        
        .checkbox-group input {
            width: 18px;
            height: 18px;
            cursor: pointer;
        }
        
        .checkbox-group label {
            margin: 0;
            cursor: pointer;
            font-size: 0.9em;
            color: #475569;
        }
        
        .btn-login {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 1em;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
        }
        
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102,126,234,0.3);
        }
        
        .register-link {
            text-align: center;
            margin-top: 25px;
            padding-top: 20px;
            border-top: 1px solid #e2e8f0;
        }
        
        .register-link a {
            color: #4f46e5;
            text-decoration: none;
            font-weight: 600;
        }
        
        .register-link a:hover {
            text-decoration: underline;
        }
        
        .error-message {
            background: #fee2e2;
            color: #dc2626;
            padding: 12px;
            border-radius: 12px;
            margin-bottom: 20px;
            border-left: 4px solid #dc2626;
        }
        
        .success-message {
            background: #d1fae5;
            color: #065f46;
            padding: 12px;
            border-radius: 12px;
            margin-bottom: 20px;
            border-left: 4px solid #10b981;
        }
        .back-link {
            display: inline-block;
            margin-top: 15px;
            color: #64748b;
            text-decoration: none;
            font-size: 0.9em;
        }
        .back-link:hover {
            color: #4f46e5;
        }